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Sample records for ageless vision glare

  1. N-Acetylcarnosine sustained drug delivery eye drops to control the signs of ageless vision: Glare sensitivity, cataract amelioration and quality of vision currently available treatment for the challenging 50,000-patient population

    Directory of Open Access Journals (Sweden)

    Mark A Babizhayev

    2008-10-01

    Full Text Available Mark A Babizhayev1, Leslie Burke2, Philip Micans3, Stuart P Richer4,51Innovative Vision Products, Inc., County of New Castle, Delaware, USA; 2Wise Choice Products LLC, London, England, United Kingdom; 3IAS Group, Sark, United Kingdom; 4Eye Clinic DVA Medical Center, North Chicago, Illinois, USA; 5Department of Family and Preventive Medicine, Rosalind Franklin University of Medicine and Science, North Chicago, Illinois, USABackground: Innovative Vision Products, Inc. (IVP’s scientists developed the lubricant eye drops (Can-C™ designed as 1% N-acetylcarnosine (NAC prodrug of L-carnosine containing a mucoadhesive cellulose-based compound combined with corneal absorption promoters in a sustained drug delivery system. Only the natural L-isomeric form of NAC raw material was specifically synthesized at the cGMP facility and employed for the manufacturing of Can-C™ eye drops.Objective and study design: In the present clinical study the authors assessed vision before and after 9 month term of topical ocular administration of NAC lubricant eye drops or placebo in 75 symptomatic patients with age-related uncomplicated cataracts in one or both eyes, with acuity in one eye of 20/40 or worse (best-corrected distance, and no previous cataract surgery in either eye and no other ocular abnormality and 72 noncataract subjects ranged in age from 54 to 78 years.Setting: Subjects in these subsample groups have reported complaints of glare and wanted to administer eye drops to get quick eye relief and quality of vision for their daily activities including driving and computer works. Following 9 months of treatment with NAC lubricant eye drops, most patients’ glare scores were improved or returned to normal in disability glare tests with Halometer DG. Improvement in disability glare was accompanied with independent improvement in acuity. Furthermore, patients with the poorest pretreatment vision were as likely to regain certain better visual function after 9

  2. Night vision and glare vision thresholds and recovery time in myopic and hyperopic eyes

    Directory of Open Access Journals (Sweden)

    K. P. Mashige

    2010-12-01

    Full Text Available The purpose of this study was to compare night vision and glare vision thresholds and recovery times in myopic and hyperopic eyes. Using a Night Sight Meter, these three parameters were measured in 44 myopic and 44 hyperopic eyes of Black male subjects age-matched 20.8 years ± 1.67 and 21.6 years ± 1.05 old respectively and compared. Thresholds were measured first by assessing the eye’s ability to see under conditions of low illumination and in the presence of a glare source. Glare recovery time was determined by measuring the minimum time neededto adjust to low levels of light illumination after exposure to a glare stimulus. Descriptive, two-sample t-test and Pearson correlation statistics were used to analyze and compare the sets of data from the two groups. The mean refractive error in the myopic eyes was –2.15 D ± 1.41 (range = –0.50 D to –4.50 D and 1.76 D ± 1.22 (range = 0.50 D to 4.00 D in the hyperopic group. The mean night vision thresholds for the myopic eyes was 32 cd/m2 ± 4.69 (range = 23 cd/m2 to 42 cd/m2 and 28.97 cd/m2 ± 4.90 (range = 18 cd/m2 to 37 cd/m2 for hyperopic eyes. The difference between the mean night vision thresholds of the myopic and hyperopic eyes wasstatistically significant (p < 0.05. For glare vision threshold, the mean for myopic eyes was 64 cd/m2 ± 5.81 (range = 53 cd/m2 to 78 cd/m2, while the mean for hyperopic eyes was 44.84 cd/m2 ± 5.69 (range = 32 cd/m2 to 59 cd/m2. Also, the difference between the mean glare vision thresholds of the myopic and hyperopic eyes was statistically significant (p < 0.05. The recovery times ranged from 0.45 s to 3.10 s for the myopic eyes and 0.30 s to 2.25 s for the hyperopic eyes. The mean glare recovery time for the myopic eyes (mean = 1.41 s ± 0.77 was significantly longer (p < 0.05 than the times for hyperopic eyes (mean = 1.04 s ± 0.65. There was a significant positive correlation between recovery times and the magnitude of myopia (r = 0.93, p < 0.05 while

  3. Relationship between absorptive lenses and contrast sensitivity in healthy young subjects with glare under photopic- and mesopic-vision conditions

    Science.gov (United States)

    Kanazawa, Masatsugu; Uozato, Hiroshi

    2013-05-01

    We investigated the effect of absorptive lenses on contrast sensitivity under photopic- and mesopic-visions with glare, from the viewpoint of luminous transmittance (LT) and spectral transmittance. The subjects were 24 healthy volunteers. Log contrast sensitivity (logCS) under two luminance conditions with glare was measured with a contrast glare test device. Binocular logCSs with absorptive lenses were compared with those without absorptive lenses (control condition). Furthermore, to investigate the effect of spectral transmittance, we calculated the ratio of stimulus quantity and the correlation between this ratio and logCS. Compared with that in the control, logCS was hardly affected in the case of high-luminous-transmittance absorptive lenses under binocular visions with glare. Middle- and long-wavelength lights effectively contribute to contrast sensitivity under photopic-vision and lights at each wavelength showed almost the same coefficients of correlation under mesopic-vision. Previous studies suggested that absorptive lenses provide users with protection against harmful radiation and glare. Our present results suggested that short-wavelength and high-LT absorptive lenses are particularly useful in daylight.

  4. Temporal Glare

    DEFF Research Database (Denmark)

    Ritschel, Tobias; Ihrke, Matthias; Frisvad, Jeppe Revall;

    2009-01-01

    Glare is a consequence of light scattered within the human eye when looking at bright light sources. This effect can be exploited for tone mapping since adding glare to the depiction of high-dynamic range (HDR) imagery on a low-dynamic range (LDR) medium can dramatically increase perceived contra...... to initially static HDR images. By conducting psychophysical studies, we validate that our method improves perceived brightness and that dynamic glare-renderings are often perceived as more attractive depending on the chosen scene.......Glare is a consequence of light scattered within the human eye when looking at bright light sources. This effect can be exploited for tone mapping since adding glare to the depiction of high-dynamic range (HDR) imagery on a low-dynamic range (LDR) medium can dramatically increase perceived contrast....... Even though most, if not all, subjects report perceiving glare as a bright pattern that fluctuates in time, up to now it has only been modeled as a static phenomenon. We argue that the temporal properties of glare are a strong means to increase perceived brightness and to produce realistic and...

  5. Evaluation on Glare Response to Car Headlight and Drivers' Visibility

    Institute of Scientific and Technical Information of China (English)

    Zhang Dianye; Wang Wuhong; Cao Qi

    1996-01-01

    This paper proposes an ideal setof glare rating scales,shows how it affects the vision legibility for driving, and simulates the situation in which cars are moving at the relative speed of 120 km/h and 180 km/h,and the light quantity change caused by the moving light sources affects vision legibility. It will offer quantitative vision data for engineers.

  6. Discomfort glare measurement

    Science.gov (United States)

    Blaszczak, Urszula J.

    2009-06-01

    In the paper some results of research on discomfort glare measurement are described. The idea of practical realization of this measurement in interiors on the basis of the analysis of the investigated room image is presented. To obtain the necessary geometric quantities the coordinates of proper pixels in the image and some parameters of the imaging system should be known. The luminance values are extracted after the analysis of the brightness distribution of calibrated image, which is registered by the pinhole digital camera. The most important properties of the camera, such as spectral sensitivity, linearity, noise and the influence of exposition parameters on the pixel brightness were investigated. After correcting the spectral sensitivity experiments in the laboratory and in the didactic room were conducted. In the laboratory test the error of the UGR measurement was lower - it reached 6,9%. Some possibilities of improving the accuracy of measurement are indicated.

  7. Discomfort Glare: What Do We Actually Know?

    Energy Technology Data Exchange (ETDEWEB)

    Clear, Robert

    2012-02-29

    Glare models were reviewed with an eye for missing conditions or inconsistencies. We found ambiguities as to when to use small source versus large source models, and as to what constitutes a glare source in a complex scene. We also found surprisingly little information validating the assumed independence of the factors driving glare. A barrier to progress in glare research is the lack of a standardized dependent measure of glare. We inverted the glare models to predict luminance, and compared model predictions against the 1949 Luckiesh & Guth data that form the basis of many of them. The models perform surprisingly poorly, particularly with regards to the luminance-size relationship and additivity. Evaluating glare in complex scenes may require fundamental changes to form of the glare models.

  8. Consensus and new improvements of disability glare

    OpenAIRE

    Yu-Wei Zheng; Jiang-Yue Zhao; Li-Wei Ma; Shuang-Ye Chen; Zi-Yan Yu; Dong Shi; Jin-Song Zhang

    2014-01-01

    Patients with early cataract may have normal visual acuity(VA)but complain that they have problems in driving at night, like seeing things through a veil. This phenomenon is defined as disability glare which maybe caused by growing stray light. Patients with intraocular lens following cataract surgery may complain about glare, halos and shadows in visual field, which are also resulted from dysphotopia. Disability glare is the VA loss due to disturbing luminance in visual field. In other words...

  9. Human-inspired lighting the intention control in robot systems with of glare avoidance%Human-inspired lighting the intention control in robot systems with of glare avoidance

    Institute of Scientific and Technical Information of China (English)

    Chen Shengyong; Guan Qiu; Liu Sheng; Bi Dexue

    2011-01-01

    This paper presents some human-inspired strategies for lighting control in a robot system for best scene interpretation, where the main intention is to avoid possible glares or highlights occurring in images. It firstly compares the characteristics of human eyes and robot eyes. Then some evaluation criteria are addressed to assess the lighting conditions. A bio-inspired method is adopted to avoid the visual glare which is caused by either direct illumination from large light sources or indirect illumination reflected by smooth surfaces. Appropriate methods are proposed to optimize the pose and optical parameters of the light source and the vision camera.

  10. "Ageless Heroes" define Blues' commitment to baby boomers. Campaign targets marketing to aging population.

    Science.gov (United States)

    Herreria, J

    1998-01-01

    Blue Cross and Blue Shield Association, with the help of agency Age Wave Health Services Inc., develops a program called Ageless Heroes to convey the insurance company's commitment to the concept of healthy aging through National Awards competition and the television program featuring celebrity seniors. PMID:10179500

  11. Glare suppression by coherence gated negation

    CERN Document Server

    Zhou, Edward Haojiang; Brake, Joshua; Ruan, Haowen; Yang, Changhuei

    2016-01-01

    Imaging of a weak target hidden behind a scattering medium can be significantly confounded by glare. We report a method, termed coherence gated negation (CGN), that uses destructive optical interference to suppress glare and allow improved imaging of a weak target. As a demonstration, we show that by permuting through a set range of amplitude and phase values for a reference beam interfering with the optical field from the glare and target reflection, we can suppress glare by an order of magnitude, even when the optical wavefront is highly disordered. This strategy significantly departs from conventional coherence gating methods in that CGN actively 'gates out' the unwanted optical contributions while conventional methods 'gate in' the target optical signal. We further show that the CGN method can outperform conventional coherence gating image quality in certain scenarios by more effectively rejecting unwanted optical contributions.

  12. Manufacturing of GLARE Parts and Structures

    Science.gov (United States)

    Sinke, J.

    2003-07-01

    GLARE is a hybrid material consisting of alternating layers of metal sheets and composite layers, requiring special attention when manufacturing of parts and structures is concerned. On one hand the applicable manufacturing processes for GLARE are limited, on the other hand, due to the constituents and composition of the laminate, it offers new opportunities for production. One of the opportunities is the manufacture of very large skin panels by lay-up techniques. Lay-up techniques are common for full composites, but uncommon for metallic structures. Nevertheless, large GLARE skin panels are made by lay-up processes. In addition, the sequences of forming and laminating processes, that can be selected, offer manufacturing options that are not applicable to metals or full composites. With respect to conventional manufacturing processes, the possibilities for Fibre Metal Laminates in general, are limited. The limits are partly due to the different failure modes, partly due to the properties of the constituents in the laminate. For machining processes: the wear of the cutting tools during machining operations of GLARE stems from the abrasive nature of the glass fibres. For the forming processes: the limited formability, expressed by a small failure strain, is related to the glass fibres. However, although these manufacturing issues may restrict the use of manufacturing processes for FMLs, application of these laminates in aircraft is not hindered.

  13. Influence of age, corneal astigmatism and some characteristics of intraocular lens on glare in pseudophakic persons

    Directory of Open Access Journals (Sweden)

    Avramović Siniša

    2007-01-01

    Full Text Available Background/Aim. Although an extraordinary visual acuity is achieved following the extracapsular cataract extraction with the implantation of intraocular lens, all the problems of vision are not solved in so doing and many of them should be considered. The aim of this study was to establish the influence of age, dioptric power of intraocular lens, corneal astigmatism and optic diameter of intraocular lens on glare in pseudophakic subjects. Methods. We examined 152 patients who underwent final correction at least two weeks after the suture removing what was performed if the astigmatism more than 2.0 D was measured by the use of a Javal keratometer. Examination was performed by a Rodenstock Adaptometer Nyctomat. According to the recommendation of the manufacturer, healthy persons should notice 50% of contrast under the constant glare and in the given time. Statistical data processing was performed by χ2 test. Results. In the group of patients with the findings lower than normal at constant glare there were 112 of eyes (73.68% as follows: 22 eyes (14.47% at the age from 50-55 years; 15 eyes (9.87% were at the age from 56-60 years; 18 eyes (11.84% were at the age from 61-65 years, and 57 eyes (37.50% were at the age from 66-70 years. Dioptric power of lenses up to 20.0 D had 37 eyes (24.3%, from 20.5-22.0 D 85 eyes (56.9% and more than 22.5 D, 27 eyes (17.8%. Regarding the results of discomfort caused by glare and corneal astigmatism, measured by a Javal keratometer, in the observed group normal results were found in 112 eyes (73.68%, and out of that number 95 (62.50% were with corneal astigmatism less than 20.0 D, and 17 (11.18% had astigmatism of 20.0 D and more. Out of 112 eyes there were 58 of them (38.16% with findings lower than normal in relation to the constant glare and with the lens diameter of 5.5 mm, 48 (31.58% with the lens diameter of 6.0mm, and 6 of them (3.95% with lens diameter of 6.5mm. Conclusion. The study determined a

  14. Evaluation of Glare at the Ivanpah Solar Electric Generating System.

    Energy Technology Data Exchange (ETDEWEB)

    Ho, Clifford K.; Sims, Cianan; Christian, Joshua Mark

    2014-07-01

    The Ivanpah Solar Electric Generating System (ISEGS), located on I - 15 about 40 miles (60 km) south of Las Vegas, NV, consists of three power towers 459 ft (140 m) tall and over 170,000 reflective heliostats with a rated capacity of 390 MW. Reports of glare from the plant have been submitted by pilots and air traffic controllers and recorded by the Aviation Safety Reporting System and the California Energy Commission since 2013. Aerial and ground - based surveys of the glare were conducted in April, 2014, to identify the cause and to quantify the irradiance and potential ocular impact s of the glare . Results showed that the intense glare viewed from the airspace above ISEGS was caused by he liostats in standby mode that were aimed to the side of the receiver. Evaluation of the glare showed that the retinal irradiance and subtended source angle of the glare from the heliostats in standby were sufficient to cause significant ocular impact (pot ential for after - image) up to a distance of %7E6 miles (10 km), but the values were below the threshold for permanent eye damage . Glare from the receivers had a low potential for after - image at all ground - based monitoring locations outside of the site bound aries. A Letter to Airmen has been issued by the Federal Aviation Administration to notify pilots of the potential glare hazards. Additional measures to mitigate the potential impacts of glare from ISGES are also presented and discussed. This page intentionally left blank

  15. Distortions and Residual Stresses of GLARE Induced by Manufacturing

    NARCIS (Netherlands)

    Abouhamzeh, M.

    2016-01-01

    GLARE is used in fuselage panels for its improved fatigue and residual strength. In this thesis, predictive models are developed for residual stresses and distortions of GLARE induced by manufacturing. Material behaviour of the epoxy adhesive and the glass-epoxy prepreg is characterised for thermal

  16. An experimental investigation of glare and restructured fiber metal laminates

    Science.gov (United States)

    Benedict, Adelina Vanessa

    Fiber Metal Laminates (FMLs) are a group of materials fabricated by bonding glass/epoxy layers within metal layers. This class of materials can provide good mechanical properties, as well as weight savings. An FML known as Glass Laminate Aluminum Reinforced Epoxy (GLARE) was studied. An experimental investigation comprising of microscopy and tensile testing was carried out using different grades of GLARE. Microscopy revealed the construction details of GLARE, while tensile testing provided means of measuring and analyzing its stress-strain responses. Next, different metal surface pretreatment methods were explored. These included sandblasting, Phosphoric Acid Anodizing (PAA), and AC-130 Sol-Gel treatment. Woven S-2 glass, an epoxy adhesive, and aluminum alloy sheet metal were used to fabricate restructured FMLs using time and cost effective procedures. Additional microscopy and tensile testing allowed for comparisons with GLARE and aircraft grade aluminum alloys. The restructured FMLs showed similar behaviors to GLARE with potential significant improvements in fabrication efficiency.

  17. Daytime veiling glare in automobiles caused by dashboard reflectance

    OpenAIRE

    Dunsäter, Andreas; Andersson, Marcus

    2008-01-01

    Veiling glare has always existed in cars, but during the last years it has been brought up as a big problem. One reason is that glossier materials are being used in car interior design. Another reason is that the customers who buy the cars are getting more quality conscious. They demand to get top quality for the high price that they pay for a car, and veiling glare problems could be regarded as “low quality”. Veiling glare is when light hits the car interior and reflects into the windshield,...

  18. Solar glare hazard analysis tool on account of determined points of time

    Energy Technology Data Exchange (ETDEWEB)

    Ho, Clifford K; Sims, Cianan Alexander

    2014-09-23

    Technologies pertaining to determining when glare will be perceived by a hypothetical observer from a glare source and the intensity of glare that will be perceived by the hypothetical observer from the glare source are described herein. A first location of a potential source of solar glare is received, and a second location of the hypothetical observer is received. Based upon such locations, including respective elevations, and known positions of the sun over time, a determination as to when the hypothetical observer will perceive glare from the potential source of solar glare is made. Subsequently, an amount of irradiance entering the eye of the hypothetical observer is calculated to assess potential ocular hazards.

  19. Color and contrast sensitivity after glare from high-brightness LEDs

    Science.gov (United States)

    Reidenbach, H.-D.

    2008-02-01

    The color contrast capability was investigated for 3 volunteers with 7 specially developed test charts in red, green, blue, cyan, magenta, yellow and black as a reference, namely without and after glare from 4 colored high-brightness LEDs. Each subject completed 56 tests in order to check especially the ability to discriminate low contrast. It was found that a contrast decrease of one level is equivalent to an increase of about 4 s in the required identification time and in addition a delay time between about 14 s and 16 s has been measured at the beginning of the respective test as a result of the dazzling glare from an LED. In addition trials have been performed with 4 different pseudoisochromatic color plates designed by Ishihara for color vision. These plates have been used to determine temporary color deficiencies after an exposure from a high-brightness LED. For this purpose 40 volunteers have been included in a laboratory test. Color vision was impaired for periods between 27 s and 186 s depending on the applied color plate and respective LED color.

  20. A PRELIMINARY STUDY ON VEGETATIVE SHADING TO MINIMISE GLARE

    Directory of Open Access Journals (Sweden)

    Christina E. Mediastika

    2004-01-01

    Full Text Available In low cost housing of warm humid regions where natural ventilation is usually employed, the presence of large openings will also cause unnecessary glare and heat gain of solar radiation This paper reports a preliminary study to handle glare issue without impairing natural ventilation. The use of climbing vegetation planted on a frame with fully adjusted foliage dense as shading devices is investigated. The frame is placed at the most possible position of the low cost housing and two variables, i.e. foliage porosity and leaf surface reflectance is studied using two computational simulation methods. Radiance is employed to calculate glare index after the vegetative shading and Brevent is used to assess ventilation flow rates occurred indoors toward indoors thermal comfort of the modelled housing. The study indicates that using climbing vegetation is possible for both reducing glare and supplying the required ventilation flow rates at the same time.

  1. Measurement of image-intensifier veiling glare

    International Nuclear Information System (INIS)

    The veiling glare point spread function and modulation transfer function (MTF) may be deduced from contrast ratio measurements. Three different methods of measuring contrast ratio were investigated: photographic, photometric and digital. Measurements were made on three different image intensifiers, two linked to a digital fluorography system; the other was conventional. Lead disks (2.5 mm thick) with a range of diameters from 18 to 50 mm were placed as close as possible to the image intensifier's input surface at the centre of the field. The X-ray beam was filtered with 1 mm copper. The results obtained using the three methods and the imaging performance of the various parts of the intensifier system were compared. This method of determining the performance of image intensifiers is of practical importance as it is not necessary to perform Fourier transforms on the image to deduce the MTF. The application of the digital method of determining contrast ratios to the routine quality assurance of digital fluorography systems is mentioned. (author)

  2. Discomfort glare with complex fenestration systems and the impact on energy use when using daylighting control

    Energy Technology Data Exchange (ETDEWEB)

    Hoffmann, Sabine; McNeil, Andrew; Lee, Eleanor S.; Kalyanam, Raghuram

    2015-11-03

    Glare is a frequent issue in highly glazed buildings. A modelling approach is presented that uses discomfort glare probability and discomfort glare index as metrics to determine occupants’ behaviour. A glare control algorithm that actuated an interior shade for glare protection based on the predicted perception was implemented in a building simulation program. A reference case with a state-of-the-art base glazing was compared to the same glazing but with five different complex fenestration systems, i.e., exterior shades. The windows with exterior shades showed significant variations in glare frequencies. Energy use intensity in a prototypical office building with daylighting controls was greatly influenced for the systems with frequent glare occurrence. While the base glazing could benefit from glare control, some of the exterior shades showed significantly greater energy use when discomfort glare-based operation of interior shades was considered.

  3. Night vision of the post-LASIK myope

    Directory of Open Access Journals (Sweden)

    R. Hansraj

    2007-01-01

    Full Text Available Purpose: Poor night vision has been reported as one of the side-effects of LASIK,  however, this area has not been widely studied.  This study therefore set out to assess and quantify the visual status of the post-LASIK patient in dim illumination as an indication of visual performance at night.  This was achieved by assessing the night vision threshold, glare vision threshold and glare recovery time.Setting: The study was carried out in Durban, Kwazulu-Natal in South Africa.Method: This study used the Night Sight Meter for assessment of the night vision thresholds, glare vision thresholds and glare  recovery times of individuals who had had LASIK at least one year before commencement of the study.  The inclusion criteria were post-surgical interval following LASIK of at least one year and willingness to participate in the study.  The exclusion criteria included previous ocular surgery other than LASIK, current ocular disease and any systemic illnesses.   One hundred subjects were selected from participating ophthalmologists’ records, using convenience sampling, at different post-operative periods that ranged from 12 to 57 months.  Other refractive findings taken included post-LASIK visual acuity measured using the Snellen Visual Acuity chart and post-LASIK refractive error, measured with the standard subjective refraction tests which included duochrome, Jackson crossed-cylinder and Humphrey’s Immediate Contrast test, which are used for comparison in this study.Results: Post-operatively, the majority of the eyes (89.2% were classified as having ‘poor’ night vision thresholds.  A similar trend was observed in the case of the glare vision thresholds as 84.7% of the eyes fell into the classification of below average.  The degree of pre-operative myopia appears to have an effect on the post-LASIK night vision and glare  thresholds.  Only glare recovery  time was not affected as 51.2% of the subjects displayed good recovery

  4. Computation of glint, glare, and solar irradiance distribution

    Science.gov (United States)

    Ho, Clifford Kuofei; Khalsa, Siri Sahib Singh

    2015-08-11

    Described herein are technologies pertaining to computing the solar irradiance distribution on a surface of a receiver in a concentrating solar power system or glint/glare emitted from a reflective entity. At least one camera captures images of the Sun and the entity of interest, wherein the images have pluralities of pixels having respective pluralities of intensity values. Based upon the intensity values of the pixels in the respective images, the solar irradiance distribution on the surface of the entity or glint/glare corresponding to the entity is computed.

  5. Night vision of the post-LASIK myope

    OpenAIRE

    R. Hansraj

    2007-01-01

    Purpose: Poor night vision has been reported as one of the side-effects of LASIK,  however, this area has not been widely studied.  This study therefore set out to assess and quantify the visual status of the post-LASIK patient in dim illumination as an indication of visual performance at night.  This was achieved by assessing the night vision threshold, glare vision threshold and glare recovery time.Setting: The study was carried out in Durban, Kwazulu-Natal in South Africa.Method: This stud...

  6. Assessment of user reaction to glare with three solar shading systems

    DEFF Research Database (Denmark)

    Christoffersen, Jens; Wienold, Jan

    2008-01-01

    Danish Building Research Institute and at the Fraunhofer Institute for Solar Energy Systems. At each site, the study was performed in two identical experimental rooms, one with subjects, and the other with measuring equipment. A total of 105 subjects were exposed to three different window arrangements...... typical for today's design of windows in office buildings. To ensure variations in potential glare situations, three different solar shading devices were included, in order to assess existing glare models and to provide a reliable database for the development of a new glare prediction model - daylight......The objective of the study was to investigate the user perception of solar shading systems regarding glare by using laboratory tests with subjects, to compare the results with existing glare rating equations and to derive a new glare prediction model. The laboratory tests were conducted at the...

  7. Assessment of user reaction to glare with three solar shading systems

    OpenAIRE

    Christoffersen, Jens; Wienold, Jan

    2008-01-01

    The objective of the study was to investigate the user perception of solar shading systems regarding glare by using laboratory tests with subjects, to compare the results with existing glare rating equations and to derive a new glare prediction model. The laboratory tests were conducted at the Danish Building Research Institute and at the Fraunhofer Institute for Solar Energy Systems. At each site, the study was performed in two identical experimental rooms, one with subjects, and the other w...

  8. Verification of simple illuminance based measures for indication of discomfort glare from windows

    DEFF Research Database (Denmark)

    Karlsen, Line Røseth; Heiselberg, Per Kvols; Bryn, Ida; Johra, Hicham

    Modern office buildings are often designed with highly glazed facades, with an intention of being sufficiently daylit. However, extensive daylight supply has its backside, as glare might be a considerable concern. From a building design perspective it is important to be able to make reasonable...... reported by 44 test subjects in a repeated measure design occupant survey and if the reported glare corresponds with the predictions from the simple Daylight Glare Probability (DGPs) model. Large individual variations were seen in the occupants’ assessment of glare in the present study. Yet, the results...... discomfort glare in early building design. Further, the observed response indicate that the participants in the present study were more tolerant to low illuminance levels and more sensitive to high illuminance levels than the DGPs model would predict. More and larger studies are needed to confirm or enfeeble...

  9. Improvements in clinical and functional vision and perceived visual disability after first and second eye cataract surgery

    OpenAIRE

    Elliott, D; Patla, A.; Bullimore, M.

    1997-01-01

    AIMS—To determine the improvements in clinical and functional vision and perceived visual disability after first and second eye cataract surgery.
METHODS—Clinical vision (monocular and binocular high and low contrast visual acuity, contrast sensitivity, and disability glare), functional vision (face identity and expression recognition, reading speed, word acuity, and mobility orientation), and perceived visual disability (Activities of Daily Vision Scale) were measured in 25 subjects before a...

  10. Efficient Fruit Defect Detection and Glare removal Algorithm by anisotropic diffusion and 2D Gabor filter

    CERN Document Server

    Katyal, Vini

    2012-01-01

    This paper focuses on fruit defect detection and glare removal using morphological operations, Glare removal can be considered as an important preprocessing step as uneven lighting may introduce it in images, which hamper the results produced through segmentation by Gabor filters .The problem of glare in images is very pronounced sometimes due to the unusual reflectance from the camera sensor or stray light entering, this method counteracts this problem and makes the defect detection much more pronounced. Anisotropic diffusion is used for further smoothening of the images and removing the high energy regions in an image for better defect detection and makes the defects more retrievable. Our algorithm is robust and scalable the employability of a particular mask for glare removal has been checked and proved useful for counteracting.this problem, anisotropic diffusion further enhances the defects with its use further Optimal Gabor filter at various orientations is used for defect detection.

  11. The dark side of photovoltaic — 3D simulation of glare assessing risk and discomfort

    Energy Technology Data Exchange (ETDEWEB)

    Rose, Thomas; Wollert, Alexander

    2015-04-15

    Photovoltaic (PV) systems form an important force in the implementation of renewable energies, but as we all know, the force has always its dark side. Besides efficiency considerations and discussions about architectures of power distribution networks, the increasing numbers of installations of PV systems for implementing renewable energies have secondary effects. PV systems can generate glare due to optical reflections and hence might be a serious concern. On the one hand, glare could affect safety, e.g. regarding traffic. On the other hand, glare is a constant source of discomfort in vicinities of PV systems. Hence, assessment of glare is decisive for the success of renewable energies near municipalities and traffic zones for the success of solar power. Several courts decided on the change of PV systems and even on their de-installation because of glare effects. Thus, location-based assessments are required to limit potential reflections and to avoid risks for public infrastructure or discomfort of residents. The question arises on how to calculate reflections accurately according to the environment's topography. Our approach is founded in a 3D-based simulation methodology to calculate and visualize reflections based on the geometry of the environment of PV systems. This computational model is implemented by an interactive tool for simulation and visualization. Hence, project planners receive flexible assistance for adjusting the parameters of solar panels amid the planning process and in particular before the installation of a PV system. - Highlights: • Solar panels cause glare that impacts neighborhoods and traffic infrastructures. • Glare might cause disability and discomfort. • 3D environment for the calculation of glare • Interactive tool to simulate and visualize reflections • Impact assessment of solar power plant farms.

  12. The dark side of photovoltaic — 3D simulation of glare assessing risk and discomfort

    International Nuclear Information System (INIS)

    Photovoltaic (PV) systems form an important force in the implementation of renewable energies, but as we all know, the force has always its dark side. Besides efficiency considerations and discussions about architectures of power distribution networks, the increasing numbers of installations of PV systems for implementing renewable energies have secondary effects. PV systems can generate glare due to optical reflections and hence might be a serious concern. On the one hand, glare could affect safety, e.g. regarding traffic. On the other hand, glare is a constant source of discomfort in vicinities of PV systems. Hence, assessment of glare is decisive for the success of renewable energies near municipalities and traffic zones for the success of solar power. Several courts decided on the change of PV systems and even on their de-installation because of glare effects. Thus, location-based assessments are required to limit potential reflections and to avoid risks for public infrastructure or discomfort of residents. The question arises on how to calculate reflections accurately according to the environment's topography. Our approach is founded in a 3D-based simulation methodology to calculate and visualize reflections based on the geometry of the environment of PV systems. This computational model is implemented by an interactive tool for simulation and visualization. Hence, project planners receive flexible assistance for adjusting the parameters of solar panels amid the planning process and in particular before the installation of a PV system. - Highlights: • Solar panels cause glare that impacts neighborhoods and traffic infrastructures. • Glare might cause disability and discomfort. • 3D environment for the calculation of glare • Interactive tool to simulate and visualize reflections • Impact assessment of solar power plant farms

  13. Polarized task lighting to reduce reflective glare in open-plan office cubicles.

    Science.gov (United States)

    Japuntich, D A

    2001-10-01

    This ergonomic study deals with the common situation where a glossy document is placed between a viewer and an under-shelf task light source in a common open-plan office cubicle workstation. With a task lamp in front, when looking at a document a viewer sees two images, the document itself and specular glare, which is the reflected image of the light source. Specular glare or veiling reflection causes eye discomfort, makes it difficult to read a document and has been thought to contribute to eyestrain. This paper analyzes the application of polarized lighting for this specific situation. The use of a linear polarized light source helps to minimize specular glare by darkening the reflected image of the light source on the document. The performance and predictive optimization of the use of polarized lighting in this situation is investigated according to female and male viewer height demographics. Theoretical predictions and light measurement analysis of specular glare reduction are compared with empirical results from testing on a panel of humans on semi-gloss finish and matte finish papers. This study shows that with the right alteration of a polarized light source position, specular glare may be significantly reduced, and correlations exist between the theory, empirical measurements and the human response to specular glare reduction. PMID:11534794

  14. A portable inspection system to estimate direct glare of various LED modules

    Science.gov (United States)

    Chen, Po-Li; Liao, Chun-Hsiang; Li, Hung-Chung; Jou, Shyh-Jye; Chen, Han-Ting; Lin, Yu-Hsin; Tang, Yu-Hsiang; Peng, Wei-Jei; Kuo, Hui-Jean; Sun, Pei-Li; Lee, Tsung-Xian

    2015-07-01

    Glare is caused by both direct and indirect light sources and discomfort glare produces visual discomfort, annoyance, or loss in visual performance and visibility. Direct glare is caused by light sources in the field of view whereas reflected glare is caused by bright reflections from polished or glossy surfaces that are reflected toward an individual. To improve visual comfort of our living environment, a portable inspection system to estimate direct glare of various commercial LED modules with the range of color temperature from 3100 K to 5300 K was developed in this study. The system utilized HDR images to obtain the illumination distribution of LED modules and was first calibrated for brightness and chromaticity and corrected with flat field, dark-corner and curvature by the installed algorithm. The index of direct glare was then automatically estimated after image capturing, and the operator can recognize the performance of LED modules and the possible effects on human being once the index was out of expecting range. In the future, we expect that the quick-response smart inspection system can be applied in several new fields and market, such as home energy diagnostics, environmental lighting and UGR monitoring and popularize it in several new fields.

  15. Visual Fatigue Evaluation: Improvement of Reflected Glare on Touch Screen for Nuclear Power Plant

    International Nuclear Information System (INIS)

    The purpose of this research is to evaluate the visual fatigue of operators caused by glare problems in the main control room of nuclear power plant. Within the limitation in the main control room, reflectors were set under the light source which generates reflected glare on touch screens. Through avoiding the light directly shines on touch screens, reflected glare were eliminated. This research matched up the setting process of reflectors, evaluated the visual fatigue of operators, and collected user's opinions before reflector setting, after the first setting, and after the second setting. The design of reflectors could refer the result of evaluations and the collection of opinions. Nevertheless, the improvement of reflected glare on touch screens could be verified by this evaluations. The result showed that setting reflectors under the light source could eliminate reflected glare effectively, and the visual fatigue was reduced both on subject and object evaluations. However, the setting direction of reflectors has potential effect on operators' visual fatigue, so the real setting of reflectors still need to be evaluated completely. The near point accommodation could reflect the effect of visual fatigue caused by changes of lighting environment. Thus, the verification of new lighting environment according to the near point accommodation is suggested

  16. Large area glare sources and their effect on discomfort and visual performance at computer workstations

    Energy Technology Data Exchange (ETDEWEB)

    Osterhaus, W.K.E. [Lawrence Berkeley Lab., CA (United States); Bailey, I.L. [California Univ., Berkeley, CA (United States). School of Optometry

    1992-05-01

    This paper studies the effects of a large area light source of variable but uniform luminance surrounding a video display terminal (VDT) on the perceived glare discomfort and visual performance of computer operators. A set of criteria was established for rating the discomfort from glare as either ``intolerable,`` ``disturbing,`` ``noticeable,`` or ``imperceptible``. Source luminance adjustments by means of a variable transformer to match the subjective glare criteria, as well as ratings of preselected lighting conditions on a visual analog scale with the same criteria, were used to determine comfortable lighting conditions. Results from the experiment indicate that subjects reliably selected a preferred lighting condition at any time when asked to adjust the luminance to produce optimum visual comfort. There was considerable between-subject variation in the range of luminances over which the surround field was neither noticeably too dim nor noticeably too bright. Comfortable luminance ranges also varied with initial presentation luminances immediately preceding the adjustment. Subjects preferred higher luminances following high initial presentation luminances. Performance speed at a difficult letter-counting task suggests that visual performance was slightly impaired by the presence of glare discomfort. Counting errors also occurred slightly more frequently under higher surround source luminances. There was a tendency for subjects to become more susceptible to glare over the course of the experiment.

  17. Vision Screening

    Science.gov (United States)

    ... offer vision screening programs for children. At what age should a child have his or her vision screened? Vision screening ... a child fails a vision screening at any age, the child should be referred for a comprehensive eye examination. ...

  18. Numerical investigation of the effect of delaminations on fracture characteristics of glare

    Science.gov (United States)

    Bhat, Sunil; Narayanan, S.

    2013-10-01

    A finite element examination of the effect of delaminations on fracture characteristics of fibre metal laminate (Glare), by comparing energy release rates of normal cracks in laminates with and without delaminations, is presented in the paper. Glare comprising thin cracked 2024-T3 aerospace aluminum alloy layers alternately bonded with E-glass fibre based composite prepregs is considered for the analysis. Delaminations are modeled with interface cohesive elements. Energy release rates of normal cracks in laminates with delaminations are found to be higher than those in the laminates without delaminations.

  19. Mobile computing device configured to compute irradiance, glint, and glare of the sun

    Science.gov (United States)

    Gupta, Vipin P; Ho, Clifford K; Khalsa, Siri Sahib

    2014-03-11

    Described herein are technologies pertaining to computing the solar irradiance distribution on a surface of a receiver in a concentrating solar power system or glint/glare emitted from a reflective entity. A mobile computing device includes at least one camera that captures images of the Sun and the entity of interest, wherein the images have pluralities of pixels having respective pluralities of intensity values. Based upon the intensity values of the pixels in the respective images, the solar irradiance distribution on the surface of the entity or glint/glare corresponding to the entity is computed by the mobile computing device.

  20. Low Vision

    Science.gov (United States)

    ... Jobs Home > Statistics and Data > Low Vision Low Vision Listen Language English Low Vision Defined: Low Vision is defined as the best- ... 2010 U.S. Age-Specific Prevalence Rates for Low Vision by Age, and Race/Ethnicity Table for 2010 ...

  1. Colour vision experimental studies in teaching of optometry

    Science.gov (United States)

    Ozolinsh, Maris; Ikaunieks, Gatis; Fomins, Sergejs

    2005-10-01

    Following aspects related to human colour vision are included in experimental lessons for optometry students of University of Latvia. Characteristics of coloured stimuli (emitting and reflective), determination their coordinates in different colour spaces. Objective characteristics of transmitting of colour stimuli through the optical system of eye together with various types of appliances (lenses, prisms, Fresnel prisms). Psychophysical determination of mono- and polychromatic stimuli perception taking into account physiology of eye, retinal colour photoreceptor topography and spectral sensitivity, spatial and temporal characteristics of retinal receptive fields. Ergonomics of visual perception, influence of illumination and glare effects, testing of colour vision deficiencies.

  2. Vision Lab

    Data.gov (United States)

    Federal Laboratory Consortium — The Vision Lab personnel perform research, development, testing and evaluation of eye protection and vision performance. The lab maintains and continues to develop...

  3. Measurement of stray light and glare: comparison of Nyktotest, Mesotest, stray light meter, and computer implemented stray light meter

    OpenAIRE

    van Rijn, L J; Nischler, C.; Gamer, D; Franssen, L.; de Wit, G; Kaper, R; Vonhoff, D; Grabner, G; Wilhelm, H.; Völker-Dieben, H.J.; van den Berg, T. J T P

    2005-01-01

    Aim: To evaluate the properties of devices for measuring stray light and glare: the Nyktotest, Mesotest, “conventional” stray light meter and a new, computer implemented version of the stray light meter.

  4. Evaluation Of Modulation Transfer Function (MTF) And Veiling Glare Characteristics For Cathode Ray Tube Displays

    Science.gov (United States)

    Banbury, J. R.

    1981-10-01

    Cathode-ray tube evaluation is becoming increasingly important in connection with the prediction of overall performance for systems incorporating an imaging display. Modulation transfer function has been measured by a method which takes account of the basic non-linearities of the crt and also offers improved accuracy by reducing the effects of phosphor screen noise. Two tests for crt internal veiling glare are discussed. Standard test conditions, which have been successfully used for a wide range of displays are described for both mtf and veiling glare. A contrast index is employed to indicate the extent of nonlinearity in the display transfer characteristic, and the paper also discusses briefly the use of generalised drive characteristics and limiting contrast curves as a supplement or alternative to modulation transfer function for definition of display performance.

  5. Low Vision Aids and Low Vision Rehabilitation

    Science.gov (United States)

    ... Español Eye Health / Eye Health A-Z Low Vision Sections What Is Low Vision? Causes of Low ... and Low Vision Rehabilitation Low Vision Resources Low Vision Aids and Low Vision Rehabilitation Feb. 16, 2012 ...

  6. VISION development

    International Nuclear Information System (INIS)

    VISION is a flexible and extensible object-oriented programming environment for prototyping computer-vision and pattern-recognition algorithms. This year's effort focused on three major areas: documentation, graphics, and support for new applications

  7. Computational vision

    CERN Document Server

    Wechsler, Harry

    1990-01-01

    The book is suitable for advanced courses in computer vision and image processing. In addition to providing an overall view of computational vision, it contains extensive material on topics that are not usually covered in computer vision texts (including parallel distributed processing and neural networks) and considers many real applications.

  8. Quality of vision in refractive and cataract surgery, indirect measurers: review article

    Directory of Open Access Journals (Sweden)

    Taís Renata Ribeira Parede

    2013-12-01

    Full Text Available Visual acuity is the measurement of an individual's ability to recognize details of an object in a space. Visual function measurements in clinical ophthalmology are limited by factors such as maximum contrast and so it might not adequately reflect the real vision conditions at that moment as well as the subjective aspects of the world perception by the patient. The objective of a successful vision-restoring surgery lies not only in gaining visual acuity lines, but also in vision quality. Therefore, refractive and cataract surgeries have the responsibility of achieving quality results. It is difficult to define quality of vision by a single parameter, and the main functional-vision tests are: contrast sensitivity, disability glare, intraocular stray light and aberrometry. In the current review the different components of the visual function are explained and the several available methods to assess the vision quality are described.

  9. Potential energy savings with exterior shades in large office buildings and the impact of discomfort glare

    Energy Technology Data Exchange (ETDEWEB)

    Hoffmann, Sabine [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Lee, Eleanor [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2015-04-01

    Exterior shades are highly efficient for reducing solar load in commercial buildings. Their impact on net energy use depends on the annual energy balance of heating, cooling, fan and lighting energy. This paper discusses the overall energy use intensity of various external shading systems for a prototypical large office building split into the different types of energy use and for different orientations and window sizes. Lighting energy was calculated for a constant lighting power as well as for dimmed lighting fixtures (daylighting control). In Section 3, slat angles and solar cut-off angles were varied for fixed exterior slat shading systems. While the most light-blocking shades performed best for the case without daylighting controls, the optimum cut-off angle with daylighting controls was found to be 30 deg for the office building prototype used in Chicago and Houston. For large window-to-wall (WWR) ratios, window related annual energy use could be reduced by at least 70 % without daylighting control and by a minimum of 86 % with daylighting control in average over all orientations. The occurrence of discomfort glare was is considered in Section 4 of the paper, which looks at the performance of commercially available exterior shading systems when an interior shade is used in addition to the exterior shade during hours when occupants would experience discomfort glare. Glare control impacts overall energy use intensity significantly for exterior shades with high transmittance, especially when daylighting controls are used. In these cases, exterior shades are only beneficial for window-to-wall areas ≥ 45% in the hot Houston climate. For smaller windows and in a heating/cooling climate like Chicago, exterior shades can increase energy consumption

  10. Design of the GLARE tool. A grease lubrication apparatus for research and education

    International Nuclear Information System (INIS)

    The GLARE: Grease Lubrication Apparatus for Research and Education was designed as a fourth year thesis project with the University of Ontario Institute of Technology (UOIT). The purpose of the apparatus is to train Ontario Power Generation Nuclear (OPGN) staff to properly lubricate bearings with grease and to help detect early equipment failures. Proper re-lubrication is critical to the nuclear industry as equipment may be inaccessible for long periods of time. A secondary purpose for the tool is for UOIT research and undergraduate laboratories.This abstract provides an overview of the project and its application to the nuclear industry. (author)

  11. Glaring IPO

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    China Everbright Bank dazzles the domestic stock market with China’s second largest IPO this year As it launched its initial public offering(IPO) in Shanghai on August 18, 2010,China Everbright Bank Co. Ltd. was greeted with a warm welcome- shares of the mid-sized bank closed at 3.66 yuan($0.54) on its first trading date, jumping 18 percent from the IPO price of 3.1 yuan($0.46).

  12. Glaring IPO

    Institute of Scientific and Technical Information of China (English)

    HU YUE

    2010-01-01

    @@ As it launched its initial public offer-ing (IPO) in Shanghai on August 18,2010, China Everbright Bank Co.Ltd. was greeted with a warm wel-come--shares of the mid-sized bank closed at 3.66 yuan ($0.54) on its first trading date,jumping 18 percent from the IPO price of 3.1 yuan ($0.46).

  13. Living with vision loss

    Science.gov (United States)

    Diabetes - vision loss; Retinopathy - vision loss; Low vision; Blindness - vision loss ... Low vision is a visual disability. Wearing regular glasses or contacts does not help. People with low vision have ...

  14. Low Vision FAQs

    Science.gov (United States)

    ... Jobs Home > Low Vision > Low Vision FAQs Healthy Vision Diabetes Diabetes Home How Much Do You Know? ... los Ojos Cómo hablarle a su oculista Low Vision FAQs Listen What is low vision? Low vision ...

  15. Glare-Tunable Transparent Electrochemical Smart Window Coupled with Transparent Organic Light-Emitting Diode

    Science.gov (United States)

    Uchida, Takayuki; Shibasaki, Masaaki; Matsuzaki, Tatsuya; Nagata, Yujiro

    2013-04-01

    We fabricated a novel device assembled by coupling a transparent organic light-emitting diode (TOLED) and a glare-tunable transparent electrochemical device. This device could be operated in six different states, namely, (1) transparent, (2) mirror, (3) black, (4) dual emission, (5) single-side emission with mirror, and (6) single-side emission with black. Switching between each of these states could be tuned by varying/selecting the applied DC bias voltage. The device showed 63.8% transmittance in the transparent state, and 42.1% reflectance in the mirror state at 700 nm. Transmittance in both the mirror and black states was less than 0.1% in the visible range.

  16. Computer vision

    Science.gov (United States)

    Gennery, D.; Cunningham, R.; Saund, E.; High, J.; Ruoff, C.

    1981-01-01

    The field of computer vision is surveyed and assessed, key research issues are identified, and possibilities for a future vision system are discussed. The problems of descriptions of two and three dimensional worlds are discussed. The representation of such features as texture, edges, curves, and corners are detailed. Recognition methods are described in which cross correlation coefficients are maximized or numerical values for a set of features are measured. Object tracking is discussed in terms of the robust matching algorithms that must be devised. Stereo vision, camera control and calibration, and the hardware and systems architecture are discussed.

  17. Vision Underwater.

    Science.gov (United States)

    Levine, Joseph S.

    1980-01-01

    Provides information regarding underwater vision. Includes a discussion of optically important interfaces, increased eye size of organisms at greater depths, visual peculiarities regarding the habitat of the coastal environment, and various pigment visual systems. (CS)

  18. Nanocellulose: a new ageless bionanomaterial

    Directory of Open Access Journals (Sweden)

    Alain Dufresne

    2013-06-01

    Full Text Available Owing to the hierarchical structure of cellulose, nanoparticles can be extracted from this naturally occurring polymer. Multiple mechanical shearing actions allow the release of more or fewer individual microfibrils. Longitudinal cutting of these microfibrils can be achieved by a strong acid hydrolysis treatment, allowing dissolution of amorphous domains. The impressive mechanical properties, reinforcing capabilities, abundance, low density, and biodegradability of these nanoparticles make them ideal candidates for the processing of polymer nanocomposites. With a Young's modulus in the range 100–130 GPa and a surface area of several hundred m2 g−1, new promising properties can be considered for cellulose.

  19. Industrial vision

    DEFF Research Database (Denmark)

    Knudsen, Ole

    1998-01-01

    This dissertation is concerned with the introduction of vision-based application s in the ship building industry. The industrial research project is divided into a natural seq uence of developments, from basic theoretical projective image generation via CAD and subpixel analysis to a description...... is present ed, and the variability of the parameters is examined and described. The concept of using CAD together with vision information is based on the fact that all items processed at OSS have an associated complete 3D CAD model that is accessible at all production states. This concept gives numerous...... possibilities for using vision in applications which otherwise would be very difficult to automate. The requirement for low tolerances in production is, despite the huge dimensions of the items involved, extreme. This fact makes great demands on the ability to do robust sub pixel estimation. A new method based...

  20. Measurement of the droplets sizes of a flash boiling spray using an improved extended glare point velocimetry and sizing

    Science.gov (United States)

    Shen, Shiquan; Jia, Ming; Wang, Tianyou; Lü, Qieni; Sun, Kai

    2016-04-01

    An improved extended glare point velocimetry and sizing (EGPVS) is proposed to investigate the droplets sizes of a flash boiling spray. When a spherical droplet with a relative refractive index from 1.16 to 1.41 is illuminated by two opposite laser sheets and a charge-coupled device camera is used to collect the s-polarization light at an observation angle of 90°, the intensities of the reflected lights are much stronger than the other order scattering lights. If the intensity of incident laser is controlled appropriately, two glare points from the reflected lights for the droplet are formed at the focused plane, while the intensities of the other order scattering lights are too weak to form any glare points. Then, the droplet diameter can be derived from the distance between the two glare points. In addition, the focused image is relative small, making it possible to measure dense spray. First, the characteristics of the improved EGPVS are discussed, and a series of standard particles are measured for validating this technique. Then, the technique is applied to investigate the droplets sizes of flash boiling spray. It is found that the minimum measurable diameter of droplets is 7.1 μm, and the relative error is less than 4.7 %. The droplet size distributions of spray are different at different stages. The Sauter mean diameter (SMD) of gasoline spray decreases gradually as the fuel temperature increases, which is different from that of a single-component fuel with a sharp decrease in SMD at the flash boiling stage.

  1. Objective Image Quality of CRT Displays under Ambient Glare: Assessing the ISO 9241-7 Ergonomic Technical Standard

    OpenAIRE

    Kempic, Joy III

    1998-01-01

    Objective Image Quality of CRT Displays under Ambient Glare: Assessing the ISO 9241-7 Ergonomic Technical Standard Joy Kempic (Abstract) This thesis assessed the readability of CRT displays viewed under ambient lighting conditions and then evaluated the findings with respect to the ISO 9241-7 standard. More specifically, two phases of work were conducted in this thesis. In Phase 1, seven monitors were evaluated photometrically according to the ISO 9241-...

  2. Visions 2001.

    Science.gov (United States)

    Rivero, Victor; Norman, Michele

    2001-01-01

    Reports on the views of 18 educational leaders regarding their vision on the future of education in an information age. Topics include people's diverse needs; relationships between morality, ethics, values, and technology; leadership; parental involvement; online courses from multiple higher education institutions; teachers' role; technology…

  3. Training Visions

    Science.gov (United States)

    Training, 2011

    2011-01-01

    In this article, "Training" asks the 2011 winners to give their predictions for what training--either in general or specifically at their companies--will look like in the next five to 10 years. Perhaps their "training visions" will spark some ideas in one's organization--or at least help prepare for what might be coming in the next decade or so.

  4. Embodied Visions

    DEFF Research Database (Denmark)

    Grodal, Torben Kragh

    Embodied Visions presents a groundbreaking analysis of film through the lens of bioculturalism, revealing how human biology as well as human culture determine how films are made and experienced. Throughout the book the author uses the breakthroughs of modern brain science to explain general...

  5. Agrarian Visions.

    Science.gov (United States)

    Theobald, Paul

    A new feature in "Country Teacher,""Agrarian Visions" reminds rural teachers that they can do something about rural decline. Like to populism of the 1890s, the "new populism" advocates rural living. Current attempts to address rural decline are contrary to agrarianism because: (1) telecommunications experts seek to solve problems of rural…

  6. Vision Loss, Sudden

    Science.gov (United States)

    ... of age-related macular degeneration. Spotlight on Aging: Vision Loss in Older People Most commonly, vision loss ... Some Causes and Features of Sudden Loss of Vision Cause Common Features* Tests Sudden loss of vision ...

  7. From bed topography to ice thickness: GlaRe, a GIS tool to reconstruct the surface of palaeoglaciers

    Science.gov (United States)

    Pellitero, Ramon; Rea, Brice; Spagnolo, Matteo; Bakke, Jostein; Ivy-Ochs, Susan; Frew, Craig; Hughes, Philip; Ribolini, Adriano; Renssen, Hans; Lukas, Sven

    2016-04-01

    We present GlaRe, A GIS tool that automatically reconstructs the 3D geometry for palaeoglaciers given the bed topography. This tool utilises a numerical approach and can work using a minimum of morphological evidence i.e. the position of the palaeoglacier front. The numerical approach is based on an iterative solution to the perfect plasticity assumption for ice rheology, explained in Benn and Hulton (2010). The tool can be run in ArcGIS 10.1 (ArcInfo license) and later updates and the toolset is written in Python code. The GlaRe toolbox presented in this paper implements a well-established approach for the determination of palaeoglacier equilibrium profiles. Significantly it permits users to quickly run multiple glacier reconstructions which were previously very laborious and time consuming (typically days for a single valley glacier). The implementation of GlaRe will facilitate the reconstruction of large numbers of palaeoglaciers which will provide opportunities for such research addressing at least two fundamental problems: 1. Investigation of the dynamics of palaeoglaciers. Glacier reconstructions are often based on a rigorous interpretation of glacial landforms but not always sufficient attention and/or time has been given to the actual reconstruction of the glacier surface, which is crucial for the calculation of palaeoglacier ELAs and subsequent derivation of quantitative palaeoclimatic data. 2. the ability to run large numbers of reconstructions and over much larger spatial areas provides an opportunity to undertake palaeoglaciers reconstructions across entire mountain, ranges, regions or even continents, allowing climatic gradients and atmospheric circulation patterns to be elucidated. The tool performance has been evaluated by comparing two extant glaciers, an icefield and a cirque/valley glacier from which the subglacial topography is known with a basic reconstruction using GlaRe. Results from the comparisons between extant glacier surfaces and modelled

  8. Visions and visioning in foresight activities

    DEFF Research Database (Denmark)

    Jørgensen, Michael Søgaard; Grosu, Dan

    2007-01-01

    The paper discusses the roles of visioning processes and visions in foresight activities and in societal discourses and changes parallel to or following foresight activities. The overall topic can be characterised as the dynamics and mechanisms that make visions and visioning processes work...... or not work. The theoretical part of the paper presents an actor-network theory approach to the analyses of visions and visioning processes, where the shaping of the visions and the visioning and what has made them work or not work is analysed. The empirical part is based on analyses of the roles of visions...... and visioning processes in a number of foresight processes from different societal contexts. The analyses have been carried out as part of the work in the COST A22 network on foresight. A vision is here understood as a description of a desirable or preferable future, compared to a scenario which is understood...

  9. Pleiades Visions

    Science.gov (United States)

    Whitehouse, M.

    2016-01-01

    Pleiades Visions (2012) is my new musical composition for organ that takes inspiration from traditional lore and music associated with the Pleiades (Seven Sisters) star cluster from Australian Aboriginal, Native American, and Native Hawaiian cultures. It is based on my doctoral dissertation research incorporating techniques from the fields of ethnomusicology and cultural astronomy; this research likely represents a new area of inquiry for both fields. This large-scale work employs the organ's vast sonic resources to evoke the majesty of the night sky and the expansive landscapes of the homelands of the above-mentioned peoples. Other important themes in Pleiades Visions are those of place, origins, cosmology, and the creation of the world.

  10. Pediatric Low Vision

    Science.gov (United States)

    ... Asked Questions Español Condiciones Chinese Conditions Pediatric Low Vision What is Low Vision? Partial vision loss that cannot be corrected causes ... and play. What are the signs of Low Vision? Some signs of low vision include difficulty recognizing ...

  11. Impairments to Vision

    Science.gov (United States)

    ... an external Non-Government web site. Impairments to Vision Normal Vision Diabetic Retinopathy Age-related Macular Degeneration In this ... pictures, fixate on the nose to simulate the vision loss. In diabetic retinopathy, the blood vessels in ...

  12. Robot vision

    International Nuclear Information System (INIS)

    Almost all industrial robots use internal sensors such as shaft encoders which measure rotary position, or tachometers which measure velocity, to control their motions. Most controllers also provide interface capabilities so that signals from conveyors, machine tools, and the robot itself may be used to accomplish a task. However, advanced external sensors, such as visual sensors, can provide a much greater degree of adaptability for robot control as well as add automatic inspection capabilities to the industrial robot. Visual and other sensors are now being used in fundamental operations such as material processing with immediate inspection, material handling with adaption, arc welding, and complex assembly tasks. A new industry of robot vision has emerged. The application of these systems is an area of great potential

  13. Cataract Vision Simulator

    Science.gov (United States)

    ... for Cataracts? Cataract Causes Cataract Diagnosis Cataract Treatment Cataract Surgery IOL Implants: Lens Replacement and Cataract Surgery Cataract Vision Simulator Cataract Vision Simulator Jun. 11, ...

  14. Vision - night blindness

    Science.gov (United States)

    ... this page: //medlineplus.gov/ency/article/003039.htm Vision - night blindness To use the sharing features on ... page, please enable JavaScript. Night blindness is poor vision at night or in dim light. Considerations Night ...

  15. All Vision Impairment

    Science.gov (United States)

    ... Cases of Vision Impairment (in thousands) by Age, Gender, and Race/Ethnicity Table for 2010 U.S. Prevalent ... Cases of Vision Impairment (in thousands) by Age, Gender, and Race/Ethnicity Table for 2000 U.S. Prevalent ...

  16. Chemicals Industry Vision

    Energy Technology Data Exchange (ETDEWEB)

    none,

    1996-12-01

    Chemical industry leaders articulated a long-term vision for the industry, its markets, and its technology in the groundbreaking 1996 document Technology Vision 2020 - The U.S. Chemical Industry. (PDF 310 KB).

  17. Your Child's Vision

    Science.gov (United States)

    ... Things to Know About Zika & Pregnancy Your Child's Vision KidsHealth > For Parents > Your Child's Vision Print A A A Text Size What's in ... La vista de su hijo Healthy eyes and vision are a critical part of kids' development. Their ...

  18. Robot Vision Library

    Science.gov (United States)

    Howard, Andrew B.; Ansar, Adnan I.; Litwin, Todd E.; Goldberg, Steven B.

    2009-01-01

    The JPL Robot Vision Library (JPLV) provides real-time robot vision algorithms for developers who are not vision specialists. The package includes algorithms for stereo ranging, visual odometry and unsurveyed camera calibration, and has unique support for very wideangle lenses

  19. Anchoring visions in organizations

    DEFF Research Database (Denmark)

    Simonsen, Jesper

    1999-01-01

    This paper introduces the term 'anchoring' within systems development: Visions, developed through early systems design within an organization, need to be deeply rooted in the organization. A vision's rationale needs to be understood by those who decide if the vision should be implemented as well as...... anchoring is considered to be a main activity, is outlined. The task of anchoring visions is described, and techniques and activities are suggested with respect to those actors that have to act on the visions and the recommendations from a design proposal. The paper concludes that obtaining appropriate...

  20. Computational approaches to vision

    Science.gov (United States)

    Barrow, H. G.; Tenenbaum, J. M.

    1986-01-01

    Vision is examined in terms of a computational process, and the competence, structure, and control of computer vision systems are analyzed. Theoretical and experimental data on the formation of a computer vision system are discussed. Consideration is given to early vision, the recovery of intrinsic surface characteristics, higher levels of interpretation, and system integration and control. A computational visual processing model is proposed and its architecture and operation are described. Examples of state-of-the-art vision systems, which include some of the levels of representation and processing mechanisms, are presented.

  1. Microwave vision for robots

    Science.gov (United States)

    Lewandowski, Leon; Struckman, Keith

    1994-01-01

    Microwave Vision (MV), a concept originally developed in 1985, could play a significant role in the solution to robotic vision problems. Originally our Microwave Vision concept was based on a pattern matching approach employing computer based stored replica correlation processing. Artificial Neural Network (ANN) processor technology offers an attractive alternative to the correlation processing approach, namely the ability to learn and to adapt to changing environments. This paper describes the Microwave Vision concept, some initial ANN-MV experiments, and the design of an ANN-MV system that has led to a second patent disclosure in the robotic vision field.

  2. Evaluation of Workpiece Temperature during Drilling of GLARE Fiber Metal Laminates Using Infrared Techniques: Effect of Cutting Parameters, Fiber Orientation and Spray Mist Application

    Directory of Open Access Journals (Sweden)

    Khaled Giasin

    2016-07-01

    Full Text Available The rise in cutting temperatures during the machining process can influence the final quality of the machined part. The impact of cutting temperatures is more critical when machining composite-metal stacks and fiber metal laminates due to the stacking nature of those hybrids which subjects the composite to heat from direct contact with metallic part of the stack and the evacuated hot chips. In this paper, the workpiece surface temperature of two grades of fiber metal laminates commercially know as GLARE is investigated. An experimental study was carried out using thermocouples and infrared thermography to determine the emissivity of the upper, lower and side surfaces of GLARE laminates. In addition, infrared thermography was used to determine the maximum temperature of the bottom surface of machined holes during drilling GLARE under dry and minimum quantity lubrication (MQL cooling conditions under different cutting parameters. The results showed that during the machining process, the workpiece surface temperature increased with the increase in feed rate and fiber orientation influenced the developed temperature in the laminate.

  3. Vision Assessment and Prescription of Low Vision Devices

    Directory of Open Access Journals (Sweden)

    Jill Keeffe

    2004-01-01

    Full Text Available Assessment of vision and prescription of low vision devices are part of a comprehensive low vision service. Other components of the service include training the person affected by low vision in use of vision and other senses, mobility, activities of daily living, and support for education, employment or leisure activities. Specialist vision rehabilitation agencies have services to provide access to information (libraries and activity centres for groups of people with impaired vision.

  4. A retrospective study of low-vision cases in an Indian tertiary eye-care hospital

    Directory of Open Access Journals (Sweden)

    Khan Sarfaraz

    2000-01-01

    Full Text Available Purpose:To obtain data on the characteristics of low-vision patients seen at a tertiary eye care hospital in India. Methods:Records of 410 patients were retrospectively reviewed at the Centre for Sight Enhancement, L.V.Prasad Eye Institute, Hyderabad, India. Patients underwent a comprehensive clinical low-vision examination. Data obtained included age, gender, consangunity, visual acuity, visual fields, ocular conditions causing low vision and types of low-vision devices and methods prescribed. Results:Two hundred and ninety seven (72% of 450 patients were male. One-fifth were in the 11-20 years age group (21%. Visual acuity in the better eye was <6/18 - 6/60 in almost half these patients (49.3%. One hundred and twenty two patients (29.9% referred with a visual acuity of ≥ 6/18, either had difficulty in reading normal print or had restricted visual fields. The main causes for low vision were: retinitis pigmentosa (19%, diabetic retinopathy (13%, Macular diseases (17.7%, and degenerative myopia (9%. Visual rehabilitation was achieved using accurate correction of ametropia (174 patients, approach magnification (74 patients and telescopes (45 patients for recognising faces, watching television and board work. Spectacle magnifiers (187 patients, hand/stand magnifiers (9 patients, closed-circuit television (3 patients, overhead illumination lamp (143 patients and reading stand (24 patients were prescribed for reading tasks. Light control devices (146 patients were used for glare control, and cane (128 patients and flashlight (50 patients for mobility. Patients were trained in activities to improve their daily living skills, (54 patients; counselled in environmental modification (144 patients and ancillary care (63 patients for educational and vocational needs. Conclusion:Data obtained from this study elucidates the characteristics of low-vision patients. This information is likely to help in the development of appropriate low vision services.

  5. Machine vision in agriculture

    OpenAIRE

    Gouws, J.

    1996-01-01

    This paper provides an overview of the use of machine vision in agriculture. Agriculture is practised in a more natural environment than most industrial undertakings, implying that agricultural automation requires robotic systems with well developed sensory abili­ties. For such systems, machine vision is an essential component. In this paper examples are used to show that the use of machine vision is already widespread in agriculture, and that there are many more potential applications for t...

  6. (Computer) Vision without Sight

    OpenAIRE

    Manduchi, Roberto; Coughlan, James

    2012-01-01

    Computer vision holds great promise for helping persons with blindness or visual impairments (VI) to interpret and explore the visual world. To this end, it is worthwhile to assess the situation critically by understanding the actual needs of the VI population and which of these needs might be addressed by computer vision. This article reviews the types of assistive technology application areas that have already been developed for VI, and the possible roles that computer vision can play in fa...

  7. FPGA Vision Data Architecture

    Science.gov (United States)

    Morfopoulos, Arin C.; Pham, Thang D.

    2013-01-01

    JPL has produced a series of FPGA (field programmable gate array) vision algorithms that were written with custom interfaces to get data in and out of each vision module. Each module has unique requirements on the data interface, and further vision modules are continually being developed, each with their own custom interfaces. Each memory module had also been designed for direct access to memory or to another memory module.

  8. Vision-based interaction

    CERN Document Server

    Turk, Matthew

    2013-01-01

    In its early years, the field of computer vision was largely motivated by researchers seeking computational models of biological vision and solutions to practical problems in manufacturing, defense, and medicine. For the past two decades or so, there has been an increasing interest in computer vision as an input modality in the context of human-computer interaction. Such vision-based interaction can endow interactive systems with visual capabilities similar to those important to human-human interaction, in order to perceive non-verbal cues and incorporate this information in applications such

  9. Artificial human vision camera

    Science.gov (United States)

    Goudou, J.-F.; Maggio, S.; Fagno, M.

    2014-10-01

    In this paper we present a real-time vision system modeling the human vision system. Our purpose is to inspire from human vision bio-mechanics to improve robotic capabilities for tasks such as objects detection and tracking. This work describes first the bio-mechanical discrepancies between human vision and classic cameras and the retinal processing stage that takes place in the eye, before the optic nerve. The second part describes our implementation of these principles on a 3-camera optical, mechanical and software model of the human eyes and associated bio-inspired attention model.

  10. Computational Design of Ageless Structural Materials Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Crack initiation and propagation is a dominant failure mode for many materials and applications – usually managed via damage tolerance approaches." ...

  11. New Term, New Vision?

    Science.gov (United States)

    Ravenhall, Mark

    2011-01-01

    During the affluent noughties it was sometimes said of government that it had "more visions than Mystic Meg and more pilots than British Airways". In 2011, the pilots, the pathfinders, the new initiatives are largely gone--implementation is the name of the game--but the visions remain. The latest one, as it affects adult learners, is in the…

  12. Copenhagen Energy Vision

    DEFF Research Database (Denmark)

    Mathiesen, Brian Vad; Lund, Rasmus Søgaard; Connolly, David;

    The short-term goal for The City of Copenhagen is a CO2 neutral energy supply by the year 2025, and the long-term vision for Denmark is a 100% renewable energy (RE) supply by the year 2050. In this project, it is concluded that Copenhagen plays a key role in this transition. The long-term vision...

  13. Color vision test

    Science.gov (United States)

    Eye test -- color; Vision test -- color; Ishihara color vision test ... lighting. The health care provider will explain the test to you. You will be shown several cards with colored dot patterns. These cards are called Ishihara plates. In the patterns, some of the dots ...

  14. Taking Care of Your Vision

    Science.gov (United States)

    ... a Friend Who Cuts? Taking Care of Your Vision KidsHealth > For Teens > Taking Care of Your Vision ... are important parts of keeping your peepers perfect. Vision Basics One of the best things you can ...

  15. Clinical Trials in Vision Research

    Science.gov (United States)

    ... Eye Health Information > Clinical Trials in Vision Research Clinical Trials in Vision Research Listen Clinical studies depend on ... vision research in the United States. Basics of Clinical Trials What is a clinical trial? Clinical trials are ...

  16. Machine Vision Handbook

    CERN Document Server

    2012-01-01

    The automation of visual inspection is becoming more and more important in modern industry as a consistent, reliable means of judging the quality of raw materials and manufactured goods . The Machine Vision Handbook  equips the reader with the practical details required to engineer integrated mechanical-optical-electronic-software systems. Machine vision is first set in the context of basic information on light, natural vision, colour sensing and optics. The physical apparatus required for mechanized image capture – lenses, cameras, scanners and light sources – are discussed followed by detailed treatment of various image-processing methods including an introduction to the QT image processing system. QT is unique to this book, and provides an example of a practical machine vision system along with extensive libraries of useful commands, functions and images which can be implemented by the reader. The main text of the book is completed by studies of a wide variety of applications of machine vision in insp...

  17. Panoramic stereo sphere vision

    Science.gov (United States)

    Feng, Weijia; Zhang, Baofeng; Röning, Juha; Zong, Xiaoning; Yi, Tian

    2013-01-01

    Conventional stereo vision systems have a small field of view (FOV) which limits their usefulness for certain applications. While panorama vision is able to "see" in all directions of the observation space, scene depth information is missed because of the mapping from 3D reference coordinates to 2D panoramic image. In this paper, we present an innovative vision system which builds by a special combined fish-eye lenses module, and is capable of producing 3D coordinate information from the whole global observation space and acquiring no blind area 360°×360° panoramic image simultaneously just using single vision equipment with one time static shooting. It is called Panoramic Stereo Sphere Vision (PSSV). We proposed the geometric model, mathematic model and parameters calibration method in this paper. Specifically, video surveillance, robotic autonomous navigation, virtual reality, driving assistance, multiple maneuvering target tracking, automatic mapping of environments and attitude estimation are some of the applications which will benefit from PSSV.

  18. Light Vision Color

    Science.gov (United States)

    Valberg, Arne

    2005-04-01

    Light Vision Color takes a well-balanced, interdisciplinary approach to our most important sensory system. The book successfully combines basics in vision sciences with recent developments from different areas such as neuroscience, biophysics, sensory psychology and philosophy. Originally published in 1998 this edition has been extensively revised and updated to include new chapters on clinical problems and eye diseases, low vision rehabilitation and the basic molecular biology and genetics of colour vision. Takes a broad interdisciplinary approach combining basics in vision sciences with the most recent developments in the area Includes an extensive list of technical terms and explanations to encourage student understanding Successfully brings together the most important areas of the subject in to one volume

  19. Machine vision is not computer vision

    Science.gov (United States)

    Batchelor, Bruce G.; Charlier, Jean-Ray

    1998-10-01

    The identity of Machine Vision as an academic and practical subject of study is asserted. In particular, the distinction between Machine Vision on the one hand and Computer Vision, Digital Image Processing, Pattern Recognition and Artificial Intelligence on the other is emphasized. The article demonstrates through four cases studies that the active involvement of a person who is sensitive to the broad aspects of vision system design can avoid disaster and can often achieve a successful machine that would not otherwise have been possible. This article is a transcript of the key- note address presented at the conference. Since the proceedings are prepared and printed before the conference, it is not possible to include a record of the response to this paper made by the delegates during the round-table discussion. It is hoped to collate and disseminate these via the World Wide Web after the event. (A link will be provided at http://bruce.cs.cf.ac.uk/bruce/index.html.).

  20. Impact of flat panel-imager veiling glare on scatter-estimation accuracy and image quality of a commercial on-board cone-beam CT imaging system

    International Nuclear Information System (INIS)

    Purpose: The purposes of this study is to measure the low frequency drop (LFD) of the modulation transfer function (MTF), associated with the long tails of the detector point spread function (PSF) of an on-board flat panel imager and study its impact on cone-beam CT (CBCT) image quality and scatter measurement accuracy. Methods: Two different experimental methods were used to characterize LFD and its associated PSF of a Varian OBI flat-panel detector system: the edge response function (ERF) method and the disk transfer function (DTF) method. PSF was estimated by fitting parametric models to these measurements for four values of the applied voltage (kVp). The resultant PSF was used to demonstrate the effect of LFD on image contrast and CT number accuracy in CBCT images reconstructed from synthetic datasets, as well as, accuracy of scatter measurements with the beam-stop method. Results: The MTFs derived from the measured ERF data revealed LFDs varying from 8% (at 60 kVp) to 10.5% (at 120 kVp), while the intensity of the long PSF tails was found to increase with increasing kVp. The veiling glare line spread functions derived from the ERF and DTF methods were in excellent agreement. Uncorrected veiling glare reduced contrast and the image intensity in CBCT reconstruction, near the phantom periphery (by 67 Hounsfield units in a 20 cm-in-diameter water phantom) and (to a smaller degree) near inhomogeneities. Use of the bow-tie filter mitigated these effects. Veiling glare also resulted in about 10%–15% overestimation of the scatter-to-primary ratio when measured with the beam-stop or beam-stop array method. Conclusions: The long tails of the detector PSF were found to have a modest dependence of beam spectrum, which is reflected on the MTF curve LFD. Our findings show that uncorrected veiling glare can affect quantitative accuracy and contrast in CBCT imaging, based on flat panel imager. In addition, it results in overestimation of the scatter-to-primary ratio

  1. FutureFarm vision

    OpenAIRE

    K. Charvát; P. Gnip; Mayer, W.

    2009-01-01

    This paper defines the first version of a vision of Future Farming project and also a knowledge management system used by European farms which will be designed and developed by the Future Farm project. An important part of the vision is a definition of external drivers and their influence on farm business in future. Paper is looking on a situation in three periods: short (2013), middle (2020) and long-term (2030). Our vision expects that the farming system will continuously converge to the si...

  2. Machine vision in agriculture

    Directory of Open Access Journals (Sweden)

    J. Gouws

    1996-07-01

    Full Text Available This paper provides an overview of the use of machine vision in agriculture. Agriculture is practised in a more natural environment than most industrial undertakings, implying that agricultural automation requires robotic systems with well developed sensory abili­ties. For such systems, machine vision is an essential component. In this paper examples are used to show that the use of machine vision is already widespread in agriculture, and that there are many more potential applications for this technology. It is also indicated that machine vision in agriculture does not only hold potential financial advantages, but that it can also contribute to improved quality of life for agricultural workers, and even for farm animals.

  3. What Is Low Vision?

    Science.gov (United States)

    ... or loupes for seeing the computer screen , sheet music, or for sewing telescopic glasses or monoculars for ... Health: Losing Vision Is Equal to Losing Hearing, Memory, Speech, or a Limb by Maureen Duffy on ...

  4. Vision and Motion Pictures.

    Science.gov (United States)

    Grambo, Gregory

    1998-01-01

    Presents activities on persistence of vision that involve students in a hands-on approach to the study of early methods of creating motion pictures. Students construct flip books, a Zoetrope, and an early movie machine. (DDR)

  5. Visioner for forskningsbiblioteker

    DEFF Research Database (Denmark)

    Hjørland, Birger

    2010-01-01

    Artiklen analyserer de udfordringer, som den digitale udvikling stiller forskningsbibliotekerne overfor. Den betragter kort forskningsbibliotekernes kernefunktioner, der i lyset af digitalisering ikke længere kan isoleres fra forlagsfunktioner og visse andre typer af formidlingsfunktioner. Vision...

  6. Visions of the City

    DEFF Research Database (Denmark)

    Pinder, David

    Visions of the City is a dramatic account of utopian urbanism in the twentieth century. It explores radical demands for new spaces and ways of living, and considers their effects on planning, architecture and struggles to shape urban landscapes. Such visions, it shows, have played a crucial role in...... to transform urban space and everyday life. He addresses in particular Constant's vision of New Babylon, finding within his proposals for future spaces produced through nomadic life, creativity and play a still powerful challenge to imagine cities otherwise. The book not only recovers vital moments...... from past hopes and dreams of modern urbanism. It also contests current claims about the 'end of utopia', arguing that reconsidering earlier projects can play a critical role in developing utopian perspectives today. Through the study of utopian visions, it aims to rekindle elements of utopianism...

  7. Synthetic Vision Systems

    Science.gov (United States)

    Prinzel, L.J.; Kramer, L.J.

    2009-01-01

    A synthetic vision system is an aircraft cockpit display technology that presents the visual environment external to the aircraft using computer-generated imagery in a manner analogous to how it would appear to the pilot if forward visibility were not restricted. The purpose of this chapter is to review the state of synthetic vision systems, and discuss selected human factors issues that should be considered when designing such displays.

  8. Leadership and vision

    OpenAIRE

    Rogers, Anita; Reynolds, Jill

    2003-01-01

    �Leadership and vision' is the subject of Chapter 3 and Rogers and Reynolds look at how managers can encourage leadership from other people, whether in their team, the organisation or in collaborative work with different agencies. They explore leadership style, and the extent to which managers can and should adapt their personal style to the differing needs of situations and people. Frontline managers may not always feel that they have much opportunity to influence the grander vision and st...

  9. Biofeedback for Better Vision

    Science.gov (United States)

    1990-01-01

    Biofeedtrac, Inc.'s Accommotrac Vision Trainer, invented by Dr. Joseph Trachtman, is based on vision research performed by Ames Research Center and a special optometer developed for the Ames program by Stanford Research Institute. In the United States, about 150 million people are myopes (nearsighted), who tend to overfocus when they look at distant objects causing blurry distant vision, or hyperopes (farsighted), whose vision blurs when they look at close objects because they tend to underfocus. The Accommotrac system is an optical/electronic system used by a doctor as an aid in teaching a patient how to contract and relax the ciliary body, the focusing muscle. The key is biofeedback, wherein the patient learns to control a bodily process or function he is not normally aware of. Trachtman claims a 90 percent success rate for correcting, improving or stopping focusing problems. The Vision Trainer has also proved effective in treating other eye problems such as eye oscillation, cross eyes, and lazy eye and in professional sports to improve athletes' peripheral vision and reaction time.

  10. Is Computer Vision Still AI?

    OpenAIRE

    Fisher, Robert B.

    1994-01-01

    Recent general AI conferences show a decline in both the number and the quality of vision papers, but there is tremendous growth in, and specialization of, computer vision conferences. Hence, one might conclude that computer vision is parting or has parted company with AI. This article proposes that the divorce of computer vision and AI suggested here is actually an open marriage: Although computer vision is developing through its own research agenda, there are many shared areas of interest, ...

  11. IDA's Energy Vision 2050

    DEFF Research Database (Denmark)

    Mathiesen, Brian Vad; Lund, Henrik; Hansen, Kenneth;

    IDA’s Energy Vision 2050 provides a Smart Energy System strategy for a 100% renewable Denmark in 2050. The vision presented should not be regarded as the only option in 2050 but as one scenario out of several possibilities. With this vision the Danish Society of Engineers, IDA, presents its third...... contribution for an energy strategy for Denmark. The IDA’s Energy Plan 2030 was prepared in 2006 and IDA’s Climate Plan was prepared in 2009. IDA’s Energy Vision 2050 is developed for IDA by representatives from The Society of Engineers and by a group of researchers at Aalborg University. It is based on state......-of-the-art knowledge about how low cost energy systems can be designed while also focusing on long-term resource efficiency. The Energy Vision 2050 has the ambition to focus on all parts of the energy system rather than single technologies, but to have an approach in which all sectors are integrated. While Denmark...

  12. Overview of sports vision

    Science.gov (United States)

    Moore, Linda A.; Ferreira, Jannie T.

    2003-03-01

    Sports vision encompasses the visual assessment and provision of sports-specific visual performance enhancement and ocular protection for athletes of all ages, genders and levels of participation. In recent years, sports vision has been identified as one of the key performance indicators in sport. It is built on four main cornerstones: corrective eyewear, protective eyewear, visual skills enhancement and performance enhancement. Although clinically well established in the US, it is still a relatively new area of optometric specialisation elsewhere in the world and is gaining increasing popularity with eyecare practitioners and researchers. This research is often multi-disciplinary and involves input from a variety of subject disciplines, mainly those of optometry, medicine, physiology, psychology, physics, chemistry, computer science and engineering. Collaborative research projects are currently underway between staff of the Schools of Physics and Computing (DIT) and the Academy of Sports Vision (RAU).

  13. Bio-inspired vision

    International Nuclear Information System (INIS)

    Nature still outperforms the most powerful computers in routine functions involving perception, sensing and actuation like vision, audition, and motion control, and is, most strikingly, orders of magnitude more energy-efficient than its artificial competitors. The reasons for the superior performance of biological systems are subject to diverse investigations, but it is clear that the form of hardware and the style of computation in nervous systems are fundamentally different from what is used in artificial synchronous information processing systems. Very generally speaking, biological neural systems rely on a large number of relatively simple, slow and unreliable processing elements and obtain performance and robustness from a massively parallel principle of operation and a high level of redundancy where the failure of single elements usually does not induce any observable system performance degradation. In the late 1980's, Carver Mead demonstrated that silicon VLSI technology can be employed in implementing ''neuromorphic'' circuits that mimic neural functions and fabricating building blocks that work like their biological role models. Neuromorphic systems, as the biological systems they model, are adaptive, fault-tolerant and scalable, and process information using energy-efficient, asynchronous, event-driven methods. In this paper, some basics of neuromorphic electronic engineering and its impact on recent developments in optical sensing and artificial vision are presented. It is demonstrated that bio-inspired vision systems have the potential to outperform conventional, frame-based vision acquisition and processing systems in many application fields and to establish new benchmarks in terms of redundancy suppression/data compression, dynamic range, temporal resolution and power efficiency to realize advanced functionality like 3D vision, object tracking, motor control, visual feedback loops, etc. in real-time. It is argued that future artificial vision systems

  14. Bio-inspired vision

    Science.gov (United States)

    Posch, C.

    2012-01-01

    Nature still outperforms the most powerful computers in routine functions involving perception, sensing and actuation like vision, audition, and motion control, and is, most strikingly, orders of magnitude more energy-efficient than its artificial competitors. The reasons for the superior performance of biological systems are subject to diverse investigations, but it is clear that the form of hardware and the style of computation in nervous systems are fundamentally different from what is used in artificial synchronous information processing systems. Very generally speaking, biological neural systems rely on a large number of relatively simple, slow and unreliable processing elements and obtain performance and robustness from a massively parallel principle of operation and a high level of redundancy where the failure of single elements usually does not induce any observable system performance degradation. In the late 1980`s, Carver Mead demonstrated that silicon VLSI technology can be employed in implementing ``neuromorphic'' circuits that mimic neural functions and fabricating building blocks that work like their biological role models. Neuromorphic systems, as the biological systems they model, are adaptive, fault-tolerant and scalable, and process information using energy-efficient, asynchronous, event-driven methods. In this paper, some basics of neuromorphic electronic engineering and its impact on recent developments in optical sensing and artificial vision are presented. It is demonstrated that bio-inspired vision systems have the potential to outperform conventional, frame-based vision acquisition and processing systems in many application fields and to establish new benchmarks in terms of redundancy suppression/data compression, dynamic range, temporal resolution and power efficiency to realize advanced functionality like 3D vision, object tracking, motor control, visual feedback loops, etc. in real-time. It is argued that future artificial vision systems

  15. En vision for CBS?

    DEFF Research Database (Denmark)

    Thyssen, Ole

    2015-01-01

    Kommentar. CBS’ ry for at være et moderne Business University med forskere fra hele verden og forskningsmæssig dynamik faldt på gulvet. Udfordringen er nu at få samlet CBS forskere om en fælles vision.......Kommentar. CBS’ ry for at være et moderne Business University med forskere fra hele verden og forskningsmæssig dynamik faldt på gulvet. Udfordringen er nu at få samlet CBS forskere om en fælles vision....

  16. Demokratiske stemmer og visioner

    DEFF Research Database (Denmark)

    Petersen, Hanne

    2014-01-01

    Artiklen knytter den amerikanske digter Walt Whitmans demokratiske og litterære visioner i det 19. århundrede til den svenske stemmeretsforkæmper Elin Wägners overvejelser over køn, krig og demokrati i det 20. århundrede. Den slutter med referencer til "Democracy Incorporated" fra 2008 af den...... amerikanske professor i politisk filosofi, Sheldon Wolin, der beskriver totalitarianismens spejlvending og demokratiets perversion i en amerikansk sammenhæng. Demokratiets overlevelse kan afhænge af stemmer og visioner fra uventede steder....

  17. Grounding Our Vision: Brain Research and Strategic Vision

    Science.gov (United States)

    Walker, Mike

    2011-01-01

    While recognizing the value of "vision," it could be argued that vision alone--at least in schools--is not enough to rally the financial and emotional support required to translate an idea into reality. A compelling vision needs to reflect substantive, research-based knowledge if it is to spark the kind of strategic thinking and insight capable of…

  18. Contact Lenses for Vision Correction

    Science.gov (United States)

    ... Ask an Ophthalmologist Español Eye Health / Glasses & Contacts Contact Lenses Sections Contact Lenses for Vision Correction Proper ... to Know About Contact Lenses Colored Contact Lenses Contact Lenses for Vision Correction Written by: Kierstan Boyd ...

  19. INL Vision and Strategy 2015

    International Nuclear Information System (INIS)

    This Laboratory vision and strategy presents INL's vision and strategy for the Laboratory and is our introduction to a special place dedicated to improving our nation's energy security future.

  20. Two Visions of America

    Science.gov (United States)

    Capaldi, Nicholas

    2012-01-01

    Since the seventeenth century, there have been two narratives about modernity in general and America in particular. The author uses the term "narrative" to include (a) facts, (b) arguments, and most important, (c) a larger vision of how one sees the world and chooses to engage the world. The first and originalist narrative is the Lockean Liberty…

  1. Computer Vision Systems

    Science.gov (United States)

    Gunasekaran, Sundaram

    Food quality is of paramount consideration for all consumers, and its importance is perhaps only second to food safety. By some definition, food safety is also incorporated into the broad categorization of food quality. Hence, the need for careful and accurate evaluation of food quality is at the forefront of research and development both in the academia and industry. Among the many available methods for food quality evaluation, computer vision has proven to be the most powerful, especially for nondestructively extracting and quantifying many features that have direct relevance to food quality assessment and control. Furthermore, computer vision systems serve to rapidly evaluate the most readily observable foods quality attributes - the external characteristics such as color, shape, size, surface texture etc. In addition, it is now possible, using advanced computer vision technologies, to “see” inside a food product and/or package to examine important quality attributes ordinarily unavailable to human evaluators. With rapid advances in electronic hardware and other associated imaging technologies, the cost-effectiveness and speed of computer vision systems have greatly improved and many practical systems are already in place in the food industry.

  2. Vision: The Leadership Difference.

    Science.gov (United States)

    Browne, Elise R.

    1986-01-01

    The author states that all types of leaders share four qualities: (1) intensity of vision, (2) ability to communicate agenda, (3) conviction in their beliefs, and (4) positive self-regard. She interviews Warren Bennis, an author on this subject, about the differences between business and volunteer leaders. (CH)

  3. Vision: attending the invisible.

    Science.gov (United States)

    Braun, Jochen

    2007-03-20

    In everyday vision, attention and awareness are hand in glove and almost impossible to tell apart. Recent work has exploited more contrived situations that allow these psychologically defined processes to be dissociated, providing insights into their respective neurophysiological correlates. PMID:17371756

  4. Visions of Mobile Learning

    Science.gov (United States)

    T.H.E. Journal, 2011

    2011-01-01

    It is almost a foregone conclusion that the mobile device will become an indispensable tool for learning in the future. That's why "T.H.E. Journal" asked a number of educators to let their imaginations go wild and conjure up visions of the future of the device in the classroom. This paper presents the views of educators who conjure up the mobile…

  5. Vision - night blindness

    Science.gov (United States)

    ... symptoms do you have? Do you have unusual stress, anxiety, or a fear of the dark? The eye exam will include: Color vision testing Pupil light reflex Refraction Retinal exam Slit lamp examination Visual acuity Other tests may be done: Electroretinogram ( ...

  6. Vision eller verklighet?

    DEFF Research Database (Denmark)

    Andersson, Jonas E

    2012-01-01

    and drawing analysis. This study suggests that there is a gap between reality and visions. Despite research-based guidelines, the architecture of contemporary residential care homes relies on universal qualities that are associated with the home environment rather than with the particular conditions...

  7. Tectonic vision in architecture

    DEFF Research Database (Denmark)

    Beim, Anne

    1999-01-01

    By introducing the concept; Tectonic Visions, The Dissertation discusses the interrelationship between the basic idea, the form principles, the choice of building technology and constructive structures within a given building. Includes Mies van der Rohe, Le Corbusier, Eames, Jorn Utzon, Louis Kahn...

  8. Direct vision internal urethrotomy

    DEFF Research Database (Denmark)

    Jakobsen, H; Willumsen, H; Søndergaard Jensen, L;

    1984-01-01

    During a five-year period, direct vision internal urethrotomy was used for the treatment of urethral strictures in 34 men. After the primary operation the patients were followed for an average period of 29 months (range 3-73 months). During this period 53% of the patients were found to have one...

  9. KiWi Vision

    DEFF Research Database (Denmark)

    Schaffert, Sebastian; Bry, Francois; Dolog, Peter;

    This deliverable describes the common vision of the KiWi project, ranging from motivation over use cases and usage scenarios to user interaction, system architecture and technologies, and the research that is performed as part of the project. The deliverable is intended for a wide audience to give...

  10. Vision: Essential Scaffolding

    Science.gov (United States)

    Murphy, Joseph; Torre, Daniela

    2015-01-01

    Few concepts are more noted in the leadership effects research than vision. It is a cardinal element in the school improvement equation as well. Yet, it remains one of the least well-specified components of that algorithm. Based on a comprehensive review of the research on effective leadership and school improvement from 1995 to 2012, we bring…

  11. VisionCamp

    DEFF Research Database (Denmark)

    Lassen, Astrid Heidemann; Løwe Nielsen, Suna

    2009-01-01

    . Baseret på forløbet VisionCamp 2008, der satte eksplicit fokus på at kombinere fagfeltet "supply chain management" og kreativitet, illustrerer artiklen camp-metodens relevans og peger på centrale del-elementer i entreprenante kompetencer (kreative kompetencer, teknisk/faglige kompetencer og relationelle...

  12. Embedded computer vision

    CERN Document Server

    Kisacanin, Branislav

    2008-01-01

    Brings together experiences from researchers in the field of embedded computer vision, from both academic and industrial research centers, and covers a broad range of challenges and trade-offs brought about by this paradigm shift. This title offers emphasis on tackling important problems for society, safety, security, health, and mobility.

  13. Dance: Verities, Values, Visions.

    Science.gov (United States)

    Boorman, Joyce, Ed.; Harris, Dorothy, Ed.

    The Binational Dance Conference was organized into three focal themes--verities, values, and visions in dance--to emphasize the known and accepted worth and value of dance, and to stimulate through knowledge and idea exchange, imaginative directions for dance in the future of both the United States and Canada. This thematic structure is also the…

  14. Optical Design of Low Glare Symmetric LED Street Light%低眩光对称式 LED 路灯光学设计

    Institute of Scientific and Technical Information of China (English)

    陶曾; 王敏; 黄胜邦; 徐雯; 王芬; 夏兵

    2015-01-01

    This paper presents an optical design of low -glare symmetric LED street lamp.Through the study of optical structures and light distribution effects of LED street lamps , its optical lens is designed into peanuts liked shape by using free -form surface.Then we get the bat wing light distribution curve . Meanwhile, the volume and array of LED are adjusted and simulated by optical simulation software , so as to achieve a low-glare, high uniformity rectangular light distribution .The average illuminance Eav is 30.96 lx, evenness Emin /Eav is 0.83, and the light extracting rate is 92.3% .%给出一种低眩光对称式 LED 照明路灯的光学设计方案。通过对 LED 路灯的光学结构和灯具配光效果进行研究,利用自由曲面设计出外形类似花生米的 LED 路灯光学透镜,得到蝙蝠翼型的配光曲线。同时,调整 LED 单元数量和阵列的排列方式,通过光学模拟软件进行仿真,从而达到低眩光、高均匀的矩形配光。其中平均照度 Eav为30.96lx,均匀度 Emin /Eav为0.83,出光率为92.3%。

  15. Cataract Vision Mimicked By Means Of Protein Denaturation In Egg Albumen

    CERN Document Server

    Mandracchia, Biagio; Ferraro, Pietro

    2015-01-01

    As the world's population ages, cataract-induced visual dysfunction and blindness is on the increase. This is a significant global problem. The most common symptoms of cataracts are glared and blurred vision. Usually, people with cataract have trouble seeing or reading at distance or in low light and also their color perception is altered. Furthermore, cataract is a sneaky disease as it is usually a very slow but progressive process, which creates adaptation so that patients find it difficult to recognize. Moreover, for the doctors it can be very difficult to explain and give comprehensive answers to the patients' symptoms. We built and tested an optic device that uses egg albumen to mimic the optical degradation of the crystalline related cataracts and that is able to visualize how the cataract impairs vision. At best of our knowledge, it is the first experimental system developed at this aim. This can be a valuable tool, which can be of help in education for students in medical sciences as well as to provid...

  16. Review of night vision metrology

    Science.gov (United States)

    Chrzanowski, K.

    2015-06-01

    A review of night vision metrology is presented in this paper. A set of reasons that create a rather chaotic metrologic situation on night vision market is presented. It is shown that there has been made a little progress in night vision metrology during last decades in spite of a big progress in night vision technology at the same period of time. It is concluded that such a big discrep- ancy between metrology development level and technology development can be an obstacle in the further development of night vision technology.

  17. Colour vision in marine organisms.

    Science.gov (United States)

    Marshall, Justin; Carleton, Karen L; Cronin, Thomas

    2015-10-01

    Colour vision in the marine environment is on average simpler than in terrestrial environments with simple or no colour vision through monochromacy or dichromacy. Monochromacy is found in marine mammals and elasmobranchs, including whales and sharks, but not some rays. Conversely, there is also a greater diversity of colour vision in the ocean than on land, examples being the polyspectral stomatopods and the many colour vision solutions found among reef fish. Recent advances in sequencing reveal more opsin (visual pigment) types than functionally useful at any one time. This diversity arises through opsin duplication and conversion. Such mechanisms allow pick-and-mix adaptation that tunes colour vision on a variety of very short non-evolutionary timescales. At least some of the diversity in marine colour vision is best explained as unconventional colour vision or as neutral drift. PMID:25725325

  18. Realisering af Vision 2020

    DEFF Research Database (Denmark)

    Bertelsen, Niels Haldor; Hansen, Ernst Jan de Place

    Repræsentanter for byggesektoren har på 11 dialogmøder drøftet Erhvervs- og Byggestyrelsens "Vision 2020 - Byggeri med mening". Drøftelserne førte til formulering af en lang række initiativforslag til realisering af visionen. Den mest centrale udfordring bliver at reducere fejl og mangler i...... byggeriet. Branchen lægger også vægt på, at styringen af Vision 2020s reaisering sker i byggesektoren. Initiativforslagene er i rapporten samlet under 3 hovedområder. Det første hovedområde lægger vægt på bygningerne, brugerbehov og det globale samfund. Det andet omhandler processen og leverancesystemet...

  19. Vision as Adaptive Epistemology

    CERN Document Server

    Licata, Ignazio

    2010-01-01

    In the last years the debate on complexity has been developing and developing in transdisciplinary way to meet the need of explanation for highly organized collective behaviors and sophisticated hierarchical arrangements in physical, biological, cognitive and social systems. Unfortunately, no clear definition has been reached, so complexity appears like an anti-reductionist paradigm in search of a theory. In our short survey we aim to suggest a clarification in relation to the notions of computational and intrinsic emergence, and to show how the latter is deeply connected to the new Logical Openness Theory, an original extension of Godel theorems to the model theory. The epistemological scenario we are going to make use of is that of the theory of vision, a particularly instructive one. Vision is an element of our primordial relationship with the world;consequently it comes as no surprise that carefully taking into consideration the processes of visual perception can lead us straight to some significant quest...

  20. 2015 Enterprise Strategic Vision

    Energy Technology Data Exchange (ETDEWEB)

    None

    2015-08-01

    This document aligns with the Department of Energy Strategic Plan for 2014-2018 and provides a framework for integrating our missions and direction for pursuing DOE’s strategic goals. The vision is a guide to advancing world-class science and engineering, supporting our people, modernizing our infrastructure, and developing a management culture that operates a safe and secure enterprise in an efficient manner.

  1. Vision without the Image

    OpenAIRE

    Bo Chen; Pietro Perona

    2016-01-01

    Novel image sensors transduce the stream of photons directly into asynchronous electrical pulses, rather than forming an image. Classical approaches to vision start from a good quality image and therefore it is tempting to consider image reconstruction as a first step to image analysis. We propose that, instead, one should focus on the task at hand (e.g., detection, tracking or control) and design algorithms that compute the relevant variables (class, position, velocity) directly from the str...

  2. Research for VISION 2020

    Directory of Open Access Journals (Sweden)

    Peter Ackland

    2010-12-01

    Full Text Available We need good quality information to be able to carry out our eye care programmes in support of VISION 2020, to measure (and improve our performance, and to advocate for the resources and support we need to succeed. Much of this information can be collected, analysed, and used as part of our daily work, as many of the articles in this issue show.

  3. Machine vision for industry

    OpenAIRE

    Ribeiro, António Fernando

    1996-01-01

    Nowadays, industry is changing its way of working in order to get more competitive. Industry wants to get more and more automated in order to reduce production times, increase productivity, improve quality production, at a cheaper cost, to be less wasteful, with less need to have a skilled operative, to be more flexible meaning easy to implement changes and possible to leave the automated process working with little supervision around the clock. Vision in Robotics helps controlling product...

  4. From Vision to Reality

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    Two scales were and are importantfor our work. The concept scale:1:10,000, or 1:1,000, or 1:500,depending on the size of the project,and the scale 1:1. The concept scale describes the vision: what is it about,where we want to go. The otherscales that architects use are purelyinstructive in nature and thereforeunimportant as far as the effect of abuilding is concerned.

  5. Vision in albinism.

    OpenAIRE

    Summers, C G

    1996-01-01

    PURPOSE: The purpose of this investigation was to study vision in albinism from 3 perspectives: first, to determine the characteristics of grating acuity development in children with albinism; second, to study the effect of illumination on grating acuity; and third, to define the effect of melanin pigment in the macula on visual acuity. METHODS: I. Binocular and monocular grating acuity was measured with the acuity card procedure in 40 children with albinism during the first 3 years of life. ...

  6. Vision without the Image

    Directory of Open Access Journals (Sweden)

    Bo Chen

    2016-04-01

    Full Text Available Novel image sensors transduce the stream of photons directly into asynchronous electrical pulses, rather than forming an image. Classical approaches to vision start from a good quality image and therefore it is tempting to consider image reconstruction as a first step to image analysis. We propose that, instead, one should focus on the task at hand (e.g., detection, tracking or control and design algorithms that compute the relevant variables (class, position, velocity directly from the stream of photons. We discuss three examples of such computer vision algorithms and test them on simulated data from photon-counting sensors. Such algorithms work just-in-time, i.e., they complete classification, search and tracking with high accuracy as soon as the information is sufficient, which is typically before there are enough photons to form a high-quality image. We argue that this is particularly useful when the photons are few or expensive, e.g., in astronomy, biological imaging, surveillance and night vision.

  7. Vision without the Image.

    Science.gov (United States)

    Chen, Bo; Perona, Pietro

    2016-01-01

    Novel image sensors transduce the stream of photons directly into asynchronous electrical pulses, rather than forming an image. Classical approaches to vision start from a good quality image and therefore it is tempting to consider image reconstruction as a first step to image analysis. We propose that, instead, one should focus on the task at hand (e.g., detection, tracking or control) and design algorithms that compute the relevant variables (class, position, velocity) directly from the stream of photons. We discuss three examples of such computer vision algorithms and test them on simulated data from photon-counting sensors. Such algorithms work just-in-time, i.e., they complete classification, search and tracking with high accuracy as soon as the information is sufficient, which is typically before there are enough photons to form a high-quality image. We argue that this is particularly useful when the photons are few or expensive, e.g., in astronomy, biological imaging, surveillance and night vision. PMID:27058543

  8. Ecstasy and vision

    Directory of Open Access Journals (Sweden)

    Anders Hultgård

    1981-01-01

    Full Text Available In this paper we shall present some observations on the role played by ecstasy in the activity of the seer, as he emerges in ancient Jewish and Iranian texts. In the Jewish religious literature of the Hellenistic-Roman period, visions are described on almost every page, and visions were the most important means of divine revelation. Specific techniques for inducing the ecstatic state are not recorded in the Jewish sources. Some elements in the pattern leading up to the vision may be interpreted as parts of a method for inducing the final ecstasy; i.e. fasting and prayer. The Iranian material shows clearly the importance of ecstasy in the activity of the seer. The ecstatic seeing also means that the visionary shares with Ahura Mazda a divine quality, the "wisdom of omniscience". The granting of the "wisdom of omniscience" appears as a temporary and it conveys to the visionary a supernatural seeing. There is evidence to suggest that chanting was an important method of inducing ecstasy within the early Zoroastrian community. We do not find in the Jewish material a clear correspondence to the Iranian notion of "omniscient wisdom".

  9. Insect-vision inspired collision warning vision processor for automobiles

    OpenAIRE

    Liñán-Cembrano, G.; Carranza-González, L.; Rind, Claire; Zarandy, A.; Soininen, Martti; Rodríguez-Vázquez, Ángel

    2008-01-01

    Vision is expected to play important roles for car safety enhancement. Imaging systems can be used to enlarging the vision field of the driver. For instance capturing and displaying views of hidden areas around the car which the driver can analyze for safer decision-making. Vision systems go a step further. They can autonomously analyze the visual information, identify dangerous situations and prompt the delivery of warning signals. For instance in case of road lane departure, if an overtakin...

  10. Review of night vision technology

    Science.gov (United States)

    Chrzanowski, K.

    2013-06-01

    Night vision based on technology of image intensifier tubes is the oldest electro-optical surveillance technology. However, it receives much less attention from international scientific community than thermal imagers or visible/NIR imagers due to series of reasons. This paper presents a review of a modern night vision technology and can help readers to understand sophisticated situation on the international night vision market.

  11. Vision without knowledge.

    OpenAIRE

    Milner, A D

    1997-01-01

    A brain-damaged patient (D.F.) with visual form agnosia is described and discussed. D.F. has a profound inability to recognize objects, places and people, in large part because of her inability to make perceptual discriminations of size, shape or orientation, despite having good visual acuity. Yet she is able to perform skilled actions that depend on that very same size, shape and orientation information that is missing from her perceptual awareness. It is suggested that her intact vision can...

  12. Visions of China

    Institute of Scientific and Technical Information of China (English)

    BAI SHI

    2011-01-01

    A100-million-pound Chinese theme park could be built in Britain to attract tourists from across Britain,Europe and even China,said a report published on August 9 by Sheffield Telegraph.Visions of China,the planned theme park,would cover an area of 120 acres in Rotherham,South Yorkshire,and feature distinct Chinese architecture including Chinese gardens,theaters,restaurants,a temple,a children's fantasy land,a Shanghai-style shopping street,a Shaolin pagoda,a hotel and a wellness center.

  13. Vision as subjective perception

    International Nuclear Information System (INIS)

    The human brain is not very different of the monkey's one: at least, its visual cortex is organized as a similar scheme. Specialized areas in the movement analysis are found and others in the forms perception. In this work, the author tries to answer to the following questions: 1)why so many visual areas? What are exactly their role in vision? Thirteen years of experimentation have not allowed to answer to these questions. The cerebral NMR imaging gives the opportunity of understanding the subjective perception of the visual world. One step which is particularly described in this work is to know how the visual cortex reacts to the optical illusions. (O.M.)

  14. Beyond Strategic Vision

    CERN Document Server

    Cowley, Michael

    2012-01-01

    Hoshin is a system which was developed in Japan in the 1960's, and is a derivative of Management By Objectives (MBO). It is a Management System for determining the appropriate course of action for an organization, and effectively accomplishing the relevant actions and results. Having recognized the power of this system, Beyond Strategic Vision tailors the Hoshin system to fit the culture of North American and European organizations. It is a "how-to" guide to the Hoshin method for executives, managers, and any other professionals who must plan as part of their normal job. The management of an o

  15. Wavefront Aberrations and Peripheral Vision

    OpenAIRE

    Lundström, Linda

    2007-01-01

    Failing eyesight causes a dramatic change in life. The aim of this project is to help people with large central visual field loss to better utilize their remaining vision. Central visual field loss means that the person has to rely on peripheral vision since the direct vision is lost, often due to a dysfunctional macula. In these cases, a full restoration of vision would require replacement or repair of the damaged retinal tissue, which is not yet possible. Instead, the present study seeks to...

  16. Industrial robot's vision systems

    Science.gov (United States)

    Iureva, Radda A.; Raskin, Evgeni O.; Komarov, Igor I.; Maltseva, Nadezhda K.; Fedosovsky, Michael E.

    2016-03-01

    Due to the improved economic situation in the high technology sectors, work on the creation of industrial robots and special mobile robotic systems are resumed. Despite this, the robotic control systems mostly remained unchanged. Hence one can see all advantages and disadvantages of these systems. This is due to lack of funds, which could greatly facilitate the work of the operator, and in some cases, completely replace it. The paper is concerned with the complex machine vision of robotic system for monitoring of underground pipelines, which collects and analyzes up to 90% of the necessary information. Vision Systems are used to identify obstacles to the process of movement on a trajectory to determine their origin, dimensions and character. The object is illuminated in a structured light, TV camera records projected structure. Distortions of the structure uniquely determine the shape of the object in view of the camera. The reference illumination is synchronized with the camera. The main parameters of the system are the basic distance between the generator and the lights and the camera parallax angle (the angle between the optical axes of the projection unit and camera).

  17. Coherent laser vision system

    Energy Technology Data Exchange (ETDEWEB)

    Sebastion, R.L. [Coleman Research Corp., Springfield, VA (United States)

    1995-10-01

    The Coherent Laser Vision System (CLVS) is being developed to provide precision real-time 3D world views to support site characterization and robotic operations and during facilities Decontamination and Decommissioning. Autonomous or semiautonomous robotic operations requires an accurate, up-to-date 3D world view. Existing technologies for real-time 3D imaging, such as AM laser radar, have limited accuracy at significant ranges and have variability in range estimates caused by lighting or surface shading. Recent advances in fiber optic component technology and digital processing components have enabled the development of a new 3D vision system based upon a fiber optic FMCW coherent laser radar. The approach includes a compact scanner with no-moving parts capable of randomly addressing all pixels. The system maintains the immunity to lighting and surface shading conditions which is characteristic to coherent laser radar. The random pixel addressability allows concentration of scanning and processing on the active areas of a scene, as is done by the human eye-brain system.

  18. Energy visions 2050

    Energy Technology Data Exchange (ETDEWEB)

    2009-07-01

    Energy Visions 2050 considers measures for addressing the enormous future challenges facing the energy sector, focusing on technological and techno-economic perspectives. The analysis of the development of technologies covers the whole energy chain, highlighting the necessity of efficient energy use in all activities of societies. The contents include a discussion on potential future low-emission and renewable energy conversion technologies, as well as new technology solutions in the industrial, building and transport sectors and in energy supply systems. The move towards zero-emission energy systems has consequenses for energy supply, and makes the analysis of energy resources presented in the book all the more valuable. Scenarios of alternative development paths to 2050 at the global, European and Finnish levels are presented, assuming different technological development options, economic growth rates, degrees of globalisation and information flows. The results show interesting differences between the scenarios with regard to energy production and use, mitigation of greenhouse gas emissions, and global warming. Energy Visions 2050 in mainly intended for those who have a fairly good knowledge of the energy sector and energy technologies, e.g. energy policymakers, experts responsible for energy-related issues in industry, and investors in energy technologies. The topics are approached from a global perspective. In some technological details, however, Finnish technology and Finland's technological achievements are highlighted. The topics and viewpoints of the book will certainly be of interest to international readers as well

  19. Python and computer vision

    Energy Technology Data Exchange (ETDEWEB)

    Doak, J. E. (Justin E.); Prasad, Lakshman

    2002-01-01

    This paper discusses the use of Python in a computer vision (CV) project. We begin by providing background information on the specific approach to CV employed by the project. This includes a brief discussion of Constrained Delaunay Triangulation (CDT), the Chordal Axis Transform (CAT), shape feature extraction and syntactic characterization, and normalization of strings representing objects. (The terms 'object' and 'blob' are used interchangeably, both referring to an entity extracted from an image.) The rest of the paper focuses on the use of Python in three critical areas: (1) interactions with a MySQL database, (2) rapid prototyping of algorithms, and (3) gluing together all components of the project including existing C and C++ modules. For (l), we provide a schema definition and discuss how the various tables interact to represent objects in the database as tree structures. (2) focuses on an algorithm to create a hierarchical representation of an object, given its string representation, and an algorithm to match unknown objects against objects in a database. And finally, (3) discusses the use of Boost Python to interact with the pre-existing C and C++ code that creates the CDTs and CATS, performs shape feature extraction and syntactic characterization, and normalizes object strings. The paper concludes with a vision of the future use of Python for the CV project.

  20. Coherent laser vision system

    International Nuclear Information System (INIS)

    The Coherent Laser Vision System (CLVS) is being developed to provide precision real-time 3D world views to support site characterization and robotic operations and during facilities Decontamination and Decommissioning. Autonomous or semiautonomous robotic operations requires an accurate, up-to-date 3D world view. Existing technologies for real-time 3D imaging, such as AM laser radar, have limited accuracy at significant ranges and have variability in range estimates caused by lighting or surface shading. Recent advances in fiber optic component technology and digital processing components have enabled the development of a new 3D vision system based upon a fiber optic FMCW coherent laser radar. The approach includes a compact scanner with no-moving parts capable of randomly addressing all pixels. The system maintains the immunity to lighting and surface shading conditions which is characteristic to coherent laser radar. The random pixel addressability allows concentration of scanning and processing on the active areas of a scene, as is done by the human eye-brain system

  1. Can machine vision be helped from insights into human vision?

    Science.gov (United States)

    Pavlidis, Theo

    1992-08-01

    Machine vision has exhibited rather slow progress over the last 25 years compared to other areas of Computer Technology and an interesting question is whether more progress will be made by continuing intensively the current approaches in research or instead by searching for new directions. I will present a thesis that more research along some of the prevailing lines will lead to best to marginal advances. For example, current edge detectors are very good at finding step edges. The problem is that their major objective, finding object outlines, is not equivalent to step edge finding. It seems that people find object outlines by a process of simultaneous interpretation and low level processing of the image. Such integration should be contrasted to one of the prevailing models in machine vision which assumes a linear sequence of a few distinct processes from low level to high level vision. (When researches talk about 'interpretation guide segmentation' they usually refer to the labeling of already obtained features using high level models of the scene.) If the levels interact strongly, then optimizing the processing techniques for each level separately (for example edge detection for low level vision) is not going to be fruitful. Since human vision is the reason that we believe that machine vision is even possible, a deeper examination of the human or animal vision recognition process is essential to the further progress of machine vision.

  2. Management Matters. Nurture Your Vision

    Science.gov (United States)

    Pappas, Marjorie L.

    2005-01-01

    In many professional roles, long-term vision may help guide short-term decisions. This is especially true for school library professionals as library media programs are constantly evolving. This author suggests strategies to assist library media specialists to nurture their vision and provides reviews of several sources and experts in the field…

  3. An overview of computer vision

    Science.gov (United States)

    Gevarter, W. B.

    1982-01-01

    An overview of computer vision is provided. Image understanding and scene analysis are emphasized, and pertinent aspects of pattern recognition are treated. The basic approach to computer vision systems, the techniques utilized, applications, the current existing systems and state-of-the-art issues and research requirements, who is doing it and who is funding it, and future trends and expectations are reviewed.

  4. Understanding and applying machine vision

    CERN Document Server

    Zeuch, Nello

    2000-01-01

    A discussion of applications of machine vision technology in the semiconductor, electronic, automotive, wood, food, pharmaceutical, printing, and container industries. It describes systems that enable projects to move forward swiftly and efficiently, and focuses on the nuances of the engineering and system integration of machine vision technology.

  5. Non-Proliferative Diabetic Retinopathy Vision Simulator

    Science.gov (United States)

    ... Retinopathy Vision Simulator Non-Proliferative Diabetic Retinopathy Vision Simulator Mar. 03, 2014 How does non-proliferative diabetic ... to form deposits. Previous Proliferative Diabetic Retinopathy Vision Simulator Related Ask an Ophthalmologist Answers Injection alternatives for ...

  6. Exercise for People with Low Vision

    Science.gov (United States)

    ... Be a Partner Exercise for People with Low Vision People with low vision can be active in many ways! Before you ... your orientation. Learn more about living with low vision from the National Eye Institute on NIH . Find ...

  7. Mali: Visions of War

    Directory of Open Access Journals (Sweden)

    Roland Marchal

    2013-06-01

    Full Text Available Political elites in Bamako articulate different understandings of the war in northern Mali, though share the same view on the restoration of Malian sovereignty. Those visions are deeply rooted in an assessment of the past failed peace agreements with Tuareg groups, a focus on social and ethnic differentiations that emphasize the role of Kidal and the will to avoid major reforms in dealing with key issues such as the efficiency of the political system, the role of Islam in the Malian polity and the complicated relations between Bamako and its neighbours. The status of AQIM in the current crisis, contrary to the international narrative, is downplayed while other armed groups, in particular the MNLA, are seen as the real, and, often, only threat.

  8. The state of development of machine vision

    OpenAIRE

    Łabudzki, Remigiusz

    2011-01-01

    Machine vision (system visional) it's a apply computer vision in industry. While computer vision is focused mainly on image processing at the level of hardware, machine vision most often requires the use of additional hardware I/O (input/output) and computer networks to transmit information generated by the other process components, such as a robot arm. Machine vision is a subcategory of engineering machinery, dealing with issues of information technology, optics, mechanics and industrial aut...

  9. 2020 Vision Project Summary

    Energy Technology Data Exchange (ETDEWEB)

    Gordon, K.W.; Scott, K.P.

    2000-11-01

    Since the 2020 Vision project began in 1996, students from participating schools have completed and submitted a variety of scenarios describing potential world and regional conditions in the year 2020 and their possible effect on US national security. This report summarizes the students' views and describes trends observed over the course of the 2020 Vision project's five years. It also highlights the main organizational features of the project. An analysis of thematic trends among the scenarios showed interesting shifts in students' thinking, particularly in their views of computer technology, US relations with China, and globalization. In 1996, most students perceived computer technology as highly beneficial to society, but as the year 2000 approached, this technology was viewed with fear and suspicion, even personified as a malicious, uncontrollable being. Yet, after New Year's passed with little disruption, students generally again perceived computer technology as beneficial. Also in 1996, students tended to see US relations with China as potentially positive, with economic interaction proving favorable to both countries. By 2000, this view had transformed into a perception of China emerging as the US' main rival and ''enemy'' in the global geopolitical realm. Regarding globalization, students in the first two years of the project tended to perceive world events as dependent on US action. However, by the end of the project, they saw the US as having little control over world events and therefore, we Americans would need to cooperate and compromise with other nations in order to maintain our own well-being.

  10. Fundamental principles of robot vision

    Science.gov (United States)

    Hall, Ernest L.

    1993-08-01

    Robot vision is a specialty of intelligent machines which describes the interaction between robotic manipulators and machine vision. Early robot vision systems were built to demonstrate that a robot with vision could adapt to changes in its environment. More recently attention is being directed toward machines with expanded adaptation and learning capabilities. The use of robot vision for automatic inspection and recognition of objects for manipulation by an industrial robot or for guidance of a mobile robot are two primary applications. Adaptation and learning characteristics are often lacking in industrial automation and if they can be added successfully, result in a more robust system. Due to a real time requirement, the robot vision methods that have proven most successful have been ones which could be reduced to a simple, fast computation. The purpose of this paper is to discuss some of the fundamental concepts in sufficient detail to provide a starting point for the interested engineer or scientist. A detailed example of a camera system viewing an object and for a simple, two dimensional robot vision system is presented. Finally, conclusions and recommendations for further study are presented.

  11. Benchmarking neuromorphic vision: lessons learnt from computer vision

    OpenAIRE

    Tan, Cheston; Lallee, Stephane; Orchard, Garrick

    2015-01-01

    Neuromorphic Vision sensors have improved greatly since the first silicon retina was presented almost three decades ago. They have recently matured to the point where they are commercially available and can be operated by laymen. However, despite improved availability of sensors, there remains a lack of good datasets, while algorithms for processing spike-based visual data are still in their infancy. On the other hand, frame-based computer vision algorithms are far more mature, thanks in part...

  12. 2020 vision for KAUST

    CERN Multimedia

    CERN Bulletin

    2010-01-01

    Felicitas Pauss, Head of International Relations at CERN, greets Members of the Board of Trustees of the King Abdullah University of Science and Technology, KAUST, who visited CERN on Friday 6 August.   Members of Board of Trustees of the King Abdullah University of Science and Technology upon their arrival at CERN. KAUST, which is situated on Saudi Arabia’s Red Sea coast, is a new, forward-looking co-educational and research university with a vision to become one of the world’s top ten science and technology Universities by 2020, stimulating the intellectual life of Saudi Arabia and making significant contributions to the country’s economy. CERN’s Director General, Rolf Heuer, is a member of the Board of Trustees. “I accepted the invitation to join the board because I believe that KAUST’s values can make a real difference to the region and to the world,” he said. The University’s mission statement emphasises achiev...

  13. Computer Vision for Timber Harvesting

    DEFF Research Database (Denmark)

    Dahl, Anders Lindbjerg

    The goal of this thesis is to investigate computer vision methods for timber harvesting operations. The background for developing computer vision for timber harvesting is to document origin of timber and to collect qualitative and quantitative parameters concerning the timber for efficient harvest...... segments. The purpose of image segmentation is to make the basis for more advanced computer vision methods like object recognition and classification. Our second method concerns image classification and we present a method where we classify small timber samples to tree species based on Active Appearance...... to the development of the logTracker system the described methods have a general applicability making them useful for many other computer vision problems....

  14. View How Glaucoma May Affect Vision

    Science.gov (United States)

    ... inbox. Sign up View How Glaucoma May Affect Vision Normal Vision This is an example of normal vision. This is also an example of how someone ... gradual and often imperceptible failing of side (peripheral) vision. Intermediate Glaucoma As glaucoma progresses, the center of ...

  15. Learning in Computer Vision and Image Understanding

    OpenAIRE

    Greenspan, Hayit

    1994-01-01

    There is an increasing interest in the area of Learning in Computer Vision and Image Understanding, both from researchers in the learning community and from researchers involved with the computer vision world. The field is characterized by a shift away from the classical, purely model-based, computer vision techniques, towards data-driven learning paradigms for solving real-world vision problems.

  16. Automatic Waterjet Positioning Vision System

    OpenAIRE

    Dziak, Damian; Jachimczyk, Bartosz; Jagusiak, Tomasz

    2012-01-01

    The goals of this work are a design and implementation of a new vision system, integrated with the waterjet machine. This system combines two commercial webcams applied on an industrial dedicated platform. A main purpose of the vision system is to detect the position and rotation of a workpiece placed on the machine table. The used object recognition algorithm consists of edge detection, standard math processing functions and noise filters. The Hough transform technique is used to extract lin...

  17. Computer vision and digital signage

    OpenAIRE

    Ravnik, Robert; Batagelj, Borut; Solina, Franc

    2008-01-01

    Digital signage in combination with computer vision oers an eective platform for out-of-home advertisement which can oer accurate audience measurement data. Such intel- ligent digital signage systems can also adapt the displayed contents to the actual audience in real time and even enable simple non-contact human computer interaction. In this paper we would like to show how digital signage can be made much more eective by using computer vision technology. Computer vis...

  18. Vision Therapy Procedures for Tunneling

    Directory of Open Access Journals (Sweden)

    Jeffrey H. Getzell, OD

    2015-08-01

    Full Text Available Tunneling is a form of an exclusive concentration and is a common spatial adaptation. Treatment strategies for tunneling and the overall visual process will be addressed. Strategies include diaphragmatic breathing, syntonics, and vision therapy activities that stress working in real space with lenses and prisms. Objectives, observations, expected responses, modifications, and questions for the patient are discussed for each vision therapy activity.

  19. Machine Learning for Computer Vision

    CERN Document Server

    Battiato, Sebastiano; Farinella, Giovanni

    2013-01-01

    Computer vision is the science and technology of making machines that see. It is concerned with the theory, design and implementation of algorithms that can automatically process visual data to recognize objects, track and recover their shape and spatial layout. The International Computer Vision Summer School - ICVSS was established in 2007 to provide both an objective and clear overview and an in-depth analysis of the state-of-the-art research in Computer Vision. The courses are delivered by world renowned experts in the field, from both academia and industry, and cover both theoretical and practical aspects of real Computer Vision problems. The school is organized every year by University of Cambridge (Computer Vision and Robotics Group) and University of Catania (Image Processing Lab). Different topics are covered each year. A summary of the past Computer Vision Summer Schools can be found at: http://www.dmi.unict.it/icvss This edited volume contains a selection of articles covering some of the talks and t...

  20. Night vision imaging system design, integration and verification in spacecraft vacuum thermal test

    Science.gov (United States)

    Shang, Yonghong; Wang, Jing; Gong, Zhe; Li, Xiyuan; Pei, Yifei; Bai, Tingzhu; Zhen, Haijing

    2015-08-01

    The purposes of spacecraft vacuum thermal test are to characterize the thermal control systems of the spacecraft and its component in its cruise configuration and to allow for early retirement of risks associated with mission-specific and novel thermal designs. The orbit heat flux is simulating by infrared lamp, infrared cage or electric heater. As infrared cage and electric heater do not emit visible light, or infrared lamp just emits limited visible light test, ordinary camera could not operate due to low luminous density in test. Moreover, some special instruments such as satellite-borne infrared sensors are sensitive to visible light and it couldn't compensate light during test. For improving the ability of fine monitoring on spacecraft and exhibition of test progress in condition of ultra-low luminous density, night vision imaging system is designed and integrated by BISEE. System is consist of high-gain image intensifier ICCD camera, assistant luminance system, glare protect system, thermal control system and computer control system. The multi-frame accumulation target detect technology is adopted for high quality image recognition in captive test. Optical system, mechanical system and electrical system are designed and integrated highly adaptable to vacuum environment. Molybdenum/Polyimide thin film electrical heater controls the temperature of ICCD camera. The results of performance validation test shown that system could operate under vacuum thermal environment of 1.33×10-3Pa vacuum degree and 100K shroud temperature in the space environment simulator, and its working temperature is maintains at 5° during two-day test. The night vision imaging system could obtain video quality of 60lp/mm resolving power.

  1. Vision Loss in Older Adults.

    Science.gov (United States)

    Pelletier, Allen L; Rojas-Roldan, Ledy; Coffin, Janis

    2016-08-01

    Vision loss affects 37 million Americans older than 50 years and one in four who are older than 80 years. The U.S. Preventive Services Task Force concludes that current evidence is insufficient to assess the balance of benefits and harms of screening for impaired visual acuity in adults older than 65 years. However, family physicians play a critical role in identifying persons who are at risk of vision loss, counseling patients, and referring patients for disease-specific treatment. The conditions that cause most cases of vision loss in older patients are age-related macular degeneration, glaucoma, ocular complications of diabetes mellitus, and age-related cataracts. Vitamin supplements can delay the progression of age-related macular degeneration. Intravitreal injection of a vascular endothelial growth factor inhibitor can preserve vision in the neovascular form of macular degeneration. Medicated eye drops reduce intraocular pressure and can delay the progression of vision loss in patients with glaucoma, but adherence to treatment is poor. Laser trabeculoplasty also lowers intraocular pressure and preserves vision in patients with primary open-angle glaucoma, but long-term studies are needed to identify who is most likely to benefit from surgery. Tight glycemic control in adults with diabetes slows the progression of diabetic retinopathy, but must be balanced against the risks of hypoglycemia and death in older adults. Fenofibrate also slows progression of diabetic retinopathy. Panretinal photocoagulation is the mainstay of treatment for diabetic retinopathy, whereas vascular endothelial growth factor inhibitors slow vision loss resulting from diabetic macular edema. Preoperative testing before cataract surgery does not improve outcomes and is not recommended. PMID:27479624

  2. Applications of Augmented Vision Head-Mounted Systems in Vision Rehabilitation

    OpenAIRE

    Peli, Eli; Luo, Gang; Bowers, Alex; Rensing, Noa

    2007-01-01

    Vision loss typically affects either the wide peripheral vision (important for mobility), or central vision (important for seeing details). Traditional optical visual aids usually recover the lost visual function, but at a high cost for the remaining visual function. We have developed a novel concept of vision-multiplexing using augmented vision head-mounted display systems to address vision loss. Two applications are discussed in this paper. In the first, minified edge images from a head-mou...

  3. Molecular basis for color vision.

    Science.gov (United States)

    Yoshizawa, T

    1994-05-01

    Amino acid sequences of four kinds of chicken cone pigments and two kinds of nocturnal gecko visual pigment were determined. Calculations of amino acid identities indicate that gecko pigments should be cone pigments. A phylogenetic tree of visual pigments constructed demonstrated that cone pigments evolved earlier than rod pigments (rhodopsins), indicating that daylight vision including color vision appeared earlier than twilight vision. The divergence of cone pigments to rhodopsins would be caused by replacing basic amino acid residues to acidic ones according to net charge calculations. A comparison between chicken rhodopsin and cone pigments (chicken green and red) displayed that the cone pigments are faster in regeneration from 11-cis retinal and opsin, faster in formation of meta II-intermediate and shorter in lifetime of meta II-intermediate than rhodopsin. These facts would partly explain the rapid dark adaptation, the rapid light response and the low photosensitivity of cones compared with rods. In comparison with di- and tri-chromatic color visions, chicken tetra-chromatic vision was discussed on the basis of both absorption spectra of cone pigments and filtering effect of oil droplets. PMID:8011932

  4. Low Vision Rehabilitation and Diabetic Retinopathy

    International Nuclear Information System (INIS)

    Diabetic retinopathy is emerging as a major cause of blindness. Diabetic retinopathy calls for a multidisciplinary to the patients. Management of the patient requires a team work by the internist, diabetologist, dietician, ophthalmologist and low vision therapist. Diabetic retinopathy very often results in vision loss. It is important for ophthalmologist to recognize the importance of low vision rehabilitation in formulating appropriate treatment strategies. People with low vision loss due to diabetic retinopathy usually experience difficulty in daily life. Most people with diabetic retinopathy (who have remaining useful vision) can be helped with low vision devices. However, often one low vision device may not be suitable for all purposes. A comprehensive low vision evaluation is required to assess the person's current visual status, identify the goals and the visual needs, and then design an individualized vision rehabilitation program to meet these needs. (author)

  5. How to Avoid Headlight Glare

    Science.gov (United States)

    ... All Glass Clear and Clean Streaks, smudges, and road grime on your windows catch and refract light. This includes the inside of your windshield. Chemicals from the plastic in your car’s interior slowly build up on ...

  6. Motion vision for mobile robots

    Science.gov (United States)

    Herrb, Matthieu

    The problem of using computer vision in mobile robots is dealt with. The datacube specialized cards and a parallel machine using a transputer network are studied. The tracking and localization of a three dimensional object in a sequence of images is examined, using first order prediction of the motion in the image plane and verification by a maximal clique search in the graph of mutually compatible matchings. A dynamic environment modeling module, using numerical fusion between trinocular stereovision and tracking of stereo matched primitives is presented. The integration of this perception system in the control architecture of a mobile robot is examined to achieve various functions, such as vision servo motion and environment modeling. The functional units implementing vision tasks and the data exchanged with other units are outlined. Experiments realized with the mobile robot Hilare 1.5 allowed the proposed algorithms and concepts to be validated.

  7. Robotic vision. [process control applications

    Science.gov (United States)

    Williams, D. S.; Wilf, J. M.; Cunningham, R. T.; Eskenazi, R.

    1979-01-01

    Robotic vision, involving the use of a vision system to control a process, is discussed. Design and selection of active sensors employing radiation of radio waves, sound waves, and laser light, respectively, to light up unobservable features in the scene are considered, as are design and selection of passive sensors, which rely on external sources of illumination. The segmentation technique by which an image is separated into different collections of contiguous picture elements having such common characteristics as color, brightness, or texture is examined, with emphasis on the edge detection technique. The IMFEX (image feature extractor) system performing edge detection and thresholding at 30 frames/sec television frame rates is described. The template matching and discrimination approach to recognize objects are noted. Applications of robotic vision in industry for tasks too monotonous or too dangerous for the workers are mentioned.

  8. Photogrammetric stations for robot vision

    Science.gov (United States)

    Haggren, Henrik G. A.

    1992-03-01

    Photogrammetric stations are used for vision based dynamic control of 3-D related phenomena. The vision sensors are fixed solid-state cameras which are permanently mounted and set up for a specific control task. The on-site calibration of the station allows the continuous processing of the 3-D space coordinates for all object points according to their actual 2-D image locations For automated control processes the object points are targeted using predefined templates extracted from the perspective images. The precision of an object point measured by the station is better than 1:10,000 of the object volume in all three coordinates. The vision application presented here is the locating of car bodies in the 3-D space of a robotic sealing cell.

  9. Advances in embedded computer vision

    CERN Document Server

    Kisacanin, Branislav

    2014-01-01

    This illuminating collection offers a fresh look at the very latest advances in the field of embedded computer vision. Emerging areas covered by this comprehensive text/reference include the embedded realization of 3D vision technologies for a variety of applications, such as stereo cameras on mobile devices. Recent trends towards the development of small unmanned aerial vehicles (UAVs) with embedded image and video processing algorithms are also examined. The authoritative insights range from historical perspectives to future developments, reviewing embedded implementation, tools, technolog

  10. Computer vision in medical imaging

    CERN Document Server

    Chen, C H

    2013-01-01

    The major progress in computer vision allows us to make extensive use of medical imaging data to provide us better diagnosis, treatment and predication of diseases. Computer vision can exploit texture, shape, contour and prior knowledge along with contextual information from image sequence and provide 3D and 4D information that helps with better human understanding. Many powerful tools have been available through image segmentation, machine learning, pattern classification, tracking, reconstruction to bring much needed quantitative information not easily available by trained human specialists

  11. Low Vision Devices for the Home

    Medline Plus

    Full Text Available ... it. For a low vision person such as yourself, the black side against a light background would ... both opportunities for somebody with low vision, like yourself, so you can go ahead and fill that ...

  12. Low Vision Devices for the Home

    Medline Plus

    Full Text Available ... have two sides to it. For a low vision person such as yourself, the black side against ... You have both opportunities for somebody with low vision, like yourself, so you can go ahead and ...

  13. A Clear Vision for Equity and Opportunity.

    Science.gov (United States)

    Gould, Marge Christensen; Gould, Herman

    2003-01-01

    Describes undetected and uncorrected vision problems for children in poverty associated with juvenile delinquency and poor academic performance. Discusses success of a project offering vision screening and free glasses for at-risk students in Tucson, Arizona. (PKP)

  14. Computer vision – cloud, smart or both

    OpenAIRE

    Chatwin, Chris; Young, Rupert; Birch, Philip; BangaloreManjunathamurthy, Nagachetan; Hassan, Waqas

    2012-01-01

    Bandwidth management and availability is going to improve greatly.The Cloud will become increasingly important for security and computer vision. Integration of Satellite, Fibre, Wireless. Impacts where you do the Computer Vision

  15. Vision Trouble Can Dim Life's Prospects

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_160136.html Vision Trouble Can Dim Life's Prospects But it's not ... THURSDAY, July 28, 2016 (HealthDay News) -- People with vision problems may face a higher risk of unemployment, ...

  16. Night Vision Device and Cockpit Displays

    Data.gov (United States)

    Federal Laboratory Consortium — The Night Vision Device and Cockpit Display labevaluates night vision devices and certifies them for use in the fleet. Lab functions supported include: Analysis of...

  17. Prevent Vision Loss with Early Diagnosis

    Medline Plus

    Full Text Available ... blind. Mary: I'd noticed that sometimes, my vision seemed a little blurry and I decided to ... the most advanced stages -- can still save their vision but they have to seek help. Now the ...

  18. Tips for Living with Low Vision

    Science.gov (United States)

    Tips for Living with Low Vision Take these 10 Steps to Help Keep Your Independence 1.Investigate! There are many places you can go for help if you have low vision. A number of agencies and organizations across the ...

  19. Understanding Your Vision: The "Imperfect Eye"

    Science.gov (United States)

    ... Issues Feature: Vision Understanding Your Vision: The "Imperfect Eye" Past Issues / Summer 2008 Table of Contents For ... including an implanted set of lenses. "Keeping your eyes healthy means learning about them and the conditions ...

  20. Neural architectures for stereo vision.

    Science.gov (United States)

    Parker, Andrew J; Smith, Jackson E T; Krug, Kristine

    2016-06-19

    Stereoscopic vision delivers a sense of depth based on binocular information but additionally acts as a mechanism for achieving correspondence between patterns arriving at the left and right eyes. We analyse quantitatively the cortical architecture for stereoscopic vision in two areas of macaque visual cortex. For primary visual cortex V1, the result is consistent with a module that is isotropic in cortical space with a diameter of at least 3 mm in surface extent. This implies that the module for stereo is larger than the repeat distance between ocular dominance columns in V1. By contrast, in the extrastriate cortical area V5/MT, which has a specialized architecture for stereo depth, the module for representation of stereo is about 1 mm in surface extent, so the representation of stereo in V5/MT is more compressed than V1 in terms of neural wiring of the neocortex. The surface extent estimated for stereo in V5/MT is consistent with measurements of its specialized domains for binocular disparity. Within V1, we suggest that long-range horizontal, anatomical connections form functional modules that serve both binocular and monocular pattern recognition: this common function may explain the distortion and disruption of monocular pattern vision observed in amblyopia.This article is part of the themed issue 'Vision in our three-dimensional world'. PMID:27269604

  1. Real-time vision systems

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, R.; Hernandez, J.E.; Lu, Shin-yee [Lawrence Livermore National Lab., CA (United States)

    1994-11-15

    Many industrial and defence applications require an ability to make instantaneous decisions based on sensor input of a time varying process. Such systems are referred to as `real-time systems` because they process and act on data as it occurs in time. When a vision sensor is used in a real-time system, the processing demands can be quite substantial, with typical data rates of 10-20 million samples per second. A real-time Machine Vision Laboratory (MVL) was established in FY94 to extend our years of experience in developing computer vision algorithms to include the development and implementation of real-time vision systems. The laboratory is equipped with a variety of hardware components, including Datacube image acquisition and processing boards, a Sun workstation, and several different types of CCD cameras, including monochrome and color area cameras and analog and digital line-scan cameras. The equipment is reconfigurable for prototyping different applications. This facility has been used to support several programs at LLNL, including O Division`s Peacemaker and Deadeye Projects as well as the CRADA with the U.S. Textile Industry, CAFE (Computer Aided Fabric Inspection). To date, we have successfully demonstrated several real-time applications: bullet tracking, stereo tracking and ranging, and web inspection. This work has been documented in the ongoing development of a real-time software library.

  2. A Vision for Teaching Practice

    Science.gov (United States)

    Hollins, Etta R.

    2011-01-01

    "Teaching practice" refers to the professional discourse, knowledge, skills, tools, and habits of mind underlying the interpretive processes that characterize expert teaching practice. Such expert practice is located within and responsive to micro- and macrocontexts and situations. In a well-articulated vision, learning teaching practice is…

  3. Polarization Imaging and Insect Vision

    Science.gov (United States)

    Green, Adam S.; Ohmann, Paul R.; Leininger, Nick E.; Kavanaugh, James A.

    2010-01-01

    For several years we have included discussions about insect vision in the optics units of our introductory physics courses. This topic is a natural extension of demonstrations involving Brewster's reflection and Rayleigh scattering of polarized light because many insects heavily rely on optical polarization for navigation and communication.…

  4. Progress in color night vision

    NARCIS (Netherlands)

    Toet, A.; Hogervorst, M.A.

    2012-01-01

    We present an overview of our recent progress and the current state-of-the-art techniques of color image fusion for night vision applications. Inspired by previously developed color opponent fusing schemes, we initially developed a simple pixel-based false color-mapping scheme that yielded fused fal

  5. Frame Rate and Human Vision

    Science.gov (United States)

    Watson, Andrew B.

    2012-01-01

    To enhance the quality of the theatre experience, the film industry is interested in achieving higher frame rates for capture and display. In this talk I will describe the basic spatio-temporal sensitivities of human vision, and how they respond to the time sequence of static images that is fundamental to cinematic presentation.

  6. The Common Vision. Reviews: Books.

    Science.gov (United States)

    Chattin-McNichols, John

    1998-01-01

    Reviews Marshak's book describing the work of educators Maria Montessori, Rudolf Steiner, Aurobindo Ghose, and Inayat Khan. Maintains that the book gives clear, concise information on each educator and presents a common vision for children and their education; also maintains that it gives theoretical and practical information and discusses…

  7. Vision impairment in Liverpool: prevalence and morbidity.

    OpenAIRE

    Rogers, M.

    1996-01-01

    A database related to the activities of the Liverpool vision assessment team was used to identify all children with vision impairment aged 0-16 years, resident in Liverpool, UK, on 1 April 1995. Prevalence rates were calculated for all children with vision impairment, and separately for two groups: those with uncomplicated vision impairment, and those with additional pathology. Visual tract pathologies were tabulated and compared. Associated handicapping conditions were defined and the extent...

  8. Understanding and Preventing Computer Vision Syndrome

    OpenAIRE

    Loh, KY; Redd, SC

    2008-01-01

    The invention of computer and advancement in information technology has revolutionized and benefited the society but at the same time has caused symptoms related to its usage such as ocular sprain, irritation, redness, dryness, blurred vision and double vision. This cluster of symptoms is known as computer vision syndrome which is characterized by the visual symptoms which result from interaction with computer display or its environment. Three major mechanisms that lead to computer vision syn...

  9. Topographic Mapping of Residual Vision by Computer

    Science.gov (United States)

    MacKeben, Manfred

    2008-01-01

    Many persons with low vision have diseases that damage the retina only in selected areas, which can lead to scotomas (blind spots) in perception. The most frequent of these diseases is age-related macular degeneration (AMD), in which foveal vision is often impaired by a central scotoma that impairs vision of fine detail and causes problems with…

  10. Practical scheduling of computer vision functions

    OpenAIRE

    Chan-Hon-Tong, Adrien; Herbin, Stéphane

    2016-01-01

    Practical scheduler in computer vision context could boost the development of robotic platform embedding large variety of computer vision functions (like image classifier). In this paper, we make a step toward such scheduler. More precisely, we offer a scheduling framework for image classification whose relevancy is clearly established by experimentation on real life computer vision dataset and scenarios.

  11. School Vision of Learning: Urban Setting

    Science.gov (United States)

    Guy, Tiffany A.

    2010-01-01

    In this paper, the author develops her school vision of learning. She explains the theories she used to help develop the vision. The author then goes into detail on the methods she will use to make her vision for a school that prepares urban students for a successful life after high school. She takes into account all the stakeholders and how they…

  12. Vision and vision-related outcome measures in multiple sclerosis

    DEFF Research Database (Denmark)

    Balcer, Laura J; Miller, David H; Reingold, Stephen C;

    2015-01-01

    to the afferent visual pathway. Abnormal eye movements also are common in multiple sclerosis, but quantitative assessment methods that can be applied in practice and clinical trials are not readily available. We summarize here a comprehensive literature search and the discussion at a recent international meeting......Visual impairment is a key manifestation of multiple sclerosis. Acute optic neuritis is a common, often presenting manifestation, but visual deficits and structural loss of retinal axonal and neuronal integrity can occur even without a history of optic neuritis. Interest in vision in multiple...... of investigators involved in the development and study of visual outcomes in multiple sclerosis, which had, as its overriding goals, to review the state of the field and identify areas for future research. We review data and principles to help us understand the importance of vision as a model for outcomes...

  13. Computer vision in microstructural analysis

    Science.gov (United States)

    Srinivasan, Malur N.; Massarweh, W.; Hough, C. L.

    1992-01-01

    The following is a laboratory experiment designed to be performed by advanced-high school and beginning-college students. It is hoped that this experiment will create an interest in and further understanding of materials science. The objective of this experiment is to demonstrate that the microstructure of engineered materials is affected by the processing conditions in manufacture, and that it is possible to characterize the microstructure using image analysis with a computer. The principle of computer vision will first be introduced followed by the description of the system developed at Texas A&M University. This in turn will be followed by the description of the experiment to obtain differences in microstructure and the characterization of the microstructure using computer vision.

  14. New development in robot vision

    CERN Document Server

    Behal, Aman; Chung, Chi-Kit

    2015-01-01

    The field of robotic vision has advanced dramatically recently with the development of new range sensors.  Tremendous progress has been made resulting in significant impact on areas such as robotic navigation, scene/environment understanding, and visual learning. This edited book provides a solid and diversified reference source for some of the most recent important advancements in the field of robotic vision. The book starts with articles that describe new techniques to understand scenes from 2D/3D data such as estimation of planar structures, recognition of multiple objects in the scene using different kinds of features as well as their spatial and semantic relationships, generation of 3D object models, approach to recognize partially occluded objects, etc. Novel techniques are introduced to improve 3D perception accuracy with other sensors such as a gyroscope, positioning accuracy with a visual servoing based alignment strategy for microassembly, and increasing object recognition reliability using related...

  15. Computer Vision for Quarry Applications

    OpenAIRE

    Christie, Gordon A

    2013-01-01

    This thesis explores the use of computer vision to facilitate three dierent processes of a quarry's operation. The rst is the blasting process. This is where operators determine where to drill in order to execute an ecient and safe blast. Having an operator manually determine the drilling angles and positions can lead to inecient and dangerous blasts. By using two cameras, oriented vertically, and separated by a xed baseline, Structure from Motion techniques can be used to crea...

  16. Company Vision and Organizational Learning

    OpenAIRE

    Vojko Toman

    2015-01-01

    The effectiveness of a company is largely dependent on the company itself; it depends above all on its corporate governance, management, and implementation, as well as on decision-making processes and coordination. Many authors believe that organizational learning and knowledge are the most relevant aspects of company effectiveness. If a company wants to be effective it needs to create and realize its vision; to do this, it needs creativity, imagination, and knowledge, which can be obtained o...

  17. Safety policies, vision and management

    OpenAIRE

    Fleury, D.

    2006-01-01

    The previous chapters demonstrated where safety problems may lie, how to analyse them, how to implement well-suited actions and how to evaluate the effects. At this stage, we should insist on the complexity of road safety actions, and therefore the importance of taking each country's specific features into account. The strategies adopted elsewhere (vision zero, sustainable safety, etc.) could then be adapted to the specific cultural, social and institutional features of each country in questi...

  18. Robust regression in computer vision

    Science.gov (United States)

    Meer, Peter; Mintz, Doron

    1991-02-01

    We describe the least median of squares (LMedS) robust estimator which identifies the surface corresponding to the absolute majority of the data points. However when all the data points are corrupted by noise LMedS may fail. This is the case in computer vision applications and we have developed a new approach which preserves the robustness of LMedS but avoids its artifacts in the presence of noise.

  19. Low vision rehabilitation: current perspectives

    OpenAIRE

    Vingolo EM; De Rosa V; Domanico D; Anselmucci F

    2015-01-01

    Enzo Maria Vingolo, Vittoria De Rosa, Daniela Domanico, Federico Anselmucci  Department of Ophthalmology, University La Sapienza of Rome, Terracina, Italy Abstract: Quality of life in low vision patients is deeply conditioned by their visual ability, and increased rates of depression, domestic injury, and need for caregiver assistance can be expected as a result of low performance. Much effort have been made recently in order to develop new tools and aids for rehabilitation of low visio...

  20. Low vision rehabilitation: current perspectives

    OpenAIRE

    Vingolo, Enzo Maria

    2015-01-01

    Enzo Maria Vingolo, Vittoria De Rosa, Daniela Domanico, Federico Anselmucci  Department of Ophthalmology, University La Sapienza of Rome, Terracina, Italy Abstract: Quality of life in low vision patients is deeply conditioned by their visual ability, and increased rates of depression, domestic injury, and need for caregiver assistance can be expected as a result of low performance. Much effort have been made recently in order to develop new tools and aids for rehabilitation of low v...

  1. RESTORING VISION USING HUMAN OPSINS

    OpenAIRE

    Cehajic-Kapetanovic, Jasmina

    2016-01-01

    Restoring vision using human opsinsJasmina Cehajic-Kapetanovic; The University of Manchester, Doctor of Philosophy, 2015Inherited retinal degenerations (IRDs) are progressive degenerative conditions that affect around 1 in 2500 people worldwide and lead to severe visual impairment due to irreversible loss of photoreceptors. These conditions are currently untreatable. However, inner retinal neurons, including bipolar and ganglion cells, can survive representing promising targets for emerging o...

  2. A Vision for the future

    OpenAIRE

    Moloney, David; Deniz, Oscar

    2015-01-01

    For the past 40 years, computer scientists and engineers have been building technology that has allowed machine vision to be used in high value applications from factory automation to Mars rovers. However, until now the availability of computational power has limited the application of these technologies to niches with a strong enough need to overcome the cost and power hurdles. This is changing rapidly as the computational means have now become available to bring computer visi...

  3. Machine vision beyond visible spectrum

    CERN Document Server

    Hammoud, Riad I; McMillan, Robert W

    2011-01-01

    The material of this book encompasses many disciplines, including visible, infrared, far infrared, millimeter wave, microwave, radar, synthetic aperture radar, and electro-optical sensors as well as the very dynamic topics of image processing, computer vision and pattern recognition. This book is composed of six parts: advanced background modeling for surveillance; advances in Tracking in Infrared imagery; methods for Pose estimation in Ultrasound and LWIR imagery; recognition in multi-spectral and synthetic aperture radar; fusion of disparate sensors; and smart Sensors.

  4. Vision Screening by Color Photography

    Science.gov (United States)

    Jayroe, R.; Richardson, J. R.; Kerr, J.; Hay, S.; Mcbride, R.

    1985-01-01

    Screening test developed for detecting a range of vision defects in eye, including common precursors to amblyopia. Test noninvasive, safe, and administered easily in field by operator with no medical training. Only minimal momentary cooperation of subject required: Thus, test shows promise for use with very young children. Test produces color-slide images of retinas of eyes under specially-controlled lighting conditions. Trained observer screens five children per minute.

  5. Biologically-inspired machine vision

    OpenAIRE

    Tsitiridis, A

    2013-01-01

    This thesis summarises research on the improved design, integration and expansion of past cortex-like computer vision models, following biologically-inspired methodologies. By adopting early theories and algorithms as a building block, particular interest has been shown for algorithmic parameterisation, feature extraction, invariance properties and classification. Overall, the major original contributions of this thesis have been: 1. The incorporation of a salient feature-based method for sem...

  6. Ademe's Visions 2030-2050

    International Nuclear Information System (INIS)

    Given that imports of fossil fuels reached a record of around 69 billion Euros en 2012, that international climate negotiations are completely bogged down and that the claims made for transition technologies remain controversial, Ademe has taken the initiative of putting forward its visions of possible long term developments for France's energy system. This prospective exercise aims to give coherence to the technological choices available and to set out a possible transition path. (authors)

  7. Active Vision for Humanoid Robots

    OpenAIRE

    X. Wang

    2015-01-01

    Human perception is an active process. By altering its viewpoint rather than passively observing surroundings and by operating on sequences of images rather than on a single frame, the human visual system has the ability to explore the most relevant information based on knowledge, therefore when growing up a human is able to develop cognitive perception. Comparably, for humanoid robots to develop cognitive perception, active vision is indispensable. Humanoid robot research has already nearly ...

  8. Information architecture. Volume 4: Vision

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The Vision document marks the transition from definition to implementation of the Department of Energy (DOE) Information Architecture Program. A description of the possibilities for the future, supported by actual experience with a process model and tool set, points toward implementation options. The directions for future information technology investments are discussed. Practical examples of how technology answers the business and information needs of the organization through coordinated and meshed data, applications, and technology architectures are related. This document is the fourth and final volume in the planned series for defining and exhibiting the DOE information architecture. The targeted scope of this document includes DOE Program Offices, field sites, contractor-operated facilities, and laboratories. This document paints a picture of how, over the next 7 years, technology may be implemented, dramatically improving the ways business is conducted at DOE. While technology is mentioned throughout this document, the vision is not about technology. The vision concerns the transition afforded by technology and the process steps to be completed to ensure alignment with business needs. This goal can be met if those directing the changing business and mission-support processes understand the capabilities afforded by architectural processes.

  9. Computer vision in control systems

    CERN Document Server

    Jain, Lakhmi

    2015-01-01

    Volume 1 : This book is focused on the recent advances in computer vision methodologies and technical solutions using conventional and intelligent paradigms. The Contributions include: ·         Morphological Image Analysis for Computer Vision Applications. ·         Methods for Detecting of Structural Changes in Computer Vision Systems. ·         Hierarchical Adaptive KL-based Transform: Algorithms and Applications. ·         Automatic Estimation for Parameters of Image Projective Transforms Based on Object-invariant Cores. ·         A Way of Energy Analysis for Image and Video Sequence Processing. ·         Optimal Measurement of Visual Motion Across Spatial and Temporal Scales. ·         Scene Analysis Using Morphological Mathematics and Fuzzy Logic. ·         Digital Video Stabilization in Static and Dynamic Scenes. ·         Implementation of Hadamard Matrices for Image Processing. ·         A Generalized Criterion ...

  10. Ames vision group research overview

    Science.gov (United States)

    Watson, Andrew B.

    1990-01-01

    A major goal of the reseach group is to develop mathematical and computational models of early human vision. These models are valuable in the prediction of human performance, in the design of visual coding schemes and displays, and in robotic vision. To date researchers have models of retinal sampling, spatial processing in visual cortex, contrast sensitivity, and motion processing. Based on their models of early human vision, researchers developed several schemes for efficient coding and compression of monochrome and color images. These are pyramid schemes that decompose the image into features that vary in location, size, orientation, and phase. To determine the perceptual fidelity of these codes, researchers developed novel human testing methods that have received considerable attention in the research community. Researchers constructed models of human visual motion processing based on physiological and psychophysical data, and have tested these models through simulation and human experiments. They also explored the application of these biological algorithms to applications in automated guidance of rotorcraft and autonomous landing of spacecraft. Researchers developed networks for inhomogeneous image sampling, for pyramid coding of images, for automatic geometrical correction of disordered samples, and for removal of motion artifacts from unstable cameras.

  11. Riemannian computing in computer vision

    CERN Document Server

    Srivastava, Anuj

    2016-01-01

    This book presents a comprehensive treatise on Riemannian geometric computations and related statistical inferences in several computer vision problems. This edited volume includes chapter contributions from leading figures in the field of computer vision who are applying Riemannian geometric approaches in problems such as face recognition, activity recognition, object detection, biomedical image analysis, and structure-from-motion. Some of the mathematical entities that necessitate a geometric analysis include rotation matrices (e.g. in modeling camera motion), stick figures (e.g. for activity recognition), subspace comparisons (e.g. in face recognition), symmetric positive-definite matrices (e.g. in diffusion tensor imaging), and function-spaces (e.g. in studying shapes of closed contours).   ·         Illustrates Riemannian computing theory on applications in computer vision, machine learning, and robotics ·         Emphasis on algorithmic advances that will allow re-application in other...

  12. AN INVESTIGATION OF VISION PROBLEMS AND THE VISION CARE SYSTEM IN RURAL CHINA.

    Science.gov (United States)

    Bai, Yunli; Yi, Hongmei; Zhang, Linxiu; Shi, Yaojiang; Ma, Xiaochen; Congdon, Nathan; Zhou, Zhongqiang; Boswell, Matthew; Rozelle, Scott

    2014-11-01

    This paper examines the prevalence of vision problems and the accessibility to and quality of vision care in rural China. We obtained data from 4 sources: 1) the National Rural Vision Care Survey; 2) the Private Optometrists Survey; 3) the County Hospital Eye Care Survey; and 4) the Rural School Vision Care Survey. The data from each of the surveys were collected by the authors during 2012. Thirty-three percent of the rural population surveyed self-reported vision problems. Twenty-two percent of subjects surveyed had ever had a vision exam. Among those who self-reported having vision problems, 34% did not wear eyeglasses. Fifty-four percent of those with vision problems who had eyeglasses did not have a vision exam prior to receiving glasses. However, having a vision exam did not always guarantee access to quality vision care. Four channels of vision care service were assessed. The school vision examination program did not increase the usage rate of eyeglasses. Each county-hospital was staffed with three eye-doctors having one year of education beyond high school, serving more than 400,000 residents. Private optometrists often had low levels of education and professional certification. In conclusion, our findings shows that the vision care system in rural China is inadequate and ineffective in meeting the needs of the rural population sampled. PMID:26466433

  13. Artificial vision support system (AVS(2)) for improved prosthetic vision.

    Science.gov (United States)

    Fink, Wolfgang; Tarbell, Mark A

    2014-11-01

    State-of-the-art and upcoming camera-driven, implanted artificial vision systems provide only tens to hundreds of electrodes, affording only limited visual perception for blind subjects. Therefore, real time image processing is crucial to enhance and optimize this limited perception. Since tens or hundreds of pixels/electrodes allow only for a very crude approximation of the typically megapixel optical resolution of the external camera image feed, the preservation and enhancement of contrast differences and transitions, such as edges, are especially important compared to picture details such as object texture. An Artificial Vision Support System (AVS(2)) is devised that displays the captured video stream in a pixelation conforming to the dimension of the epi-retinal implant electrode array. AVS(2), using efficient image processing modules, modifies the captured video stream in real time, enhancing 'present but hidden' objects to overcome inadequacies or extremes in the camera imagery. As a result, visual prosthesis carriers may now be able to discern such objects in their 'field-of-view', thus enabling mobility in environments that would otherwise be too hazardous to navigate. The image processing modules can be engaged repeatedly in a user-defined order, which is a unique capability. AVS(2) is directly applicable to any artificial vision system that is based on an imaging modality (video, infrared, sound, ultrasound, microwave, radar, etc.) as the first step in the stimulation/processing cascade, such as: retinal implants (i.e. epi-retinal, sub-retinal, suprachoroidal), optic nerve implants, cortical implants, electric tongue stimulators, or tactile stimulators. PMID:25286349

  14. Vision and vision-related outcome measures in multiple sclerosis.

    Science.gov (United States)

    Balcer, Laura J; Miller, David H; Reingold, Stephen C; Cohen, Jeffrey A

    2015-01-01

    Visual impairment is a key manifestation of multiple sclerosis. Acute optic neuritis is a common, often presenting manifestation, but visual deficits and structural loss of retinal axonal and neuronal integrity can occur even without a history of optic neuritis. Interest in vision in multiple sclerosis is growing, partially in response to the development of sensitive visual function tests, structural markers such as optical coherence tomography and magnetic resonance imaging, and quality of life measures that give clinical meaning to the structure-function correlations that are unique to the afferent visual pathway. Abnormal eye movements also are common in multiple sclerosis, but quantitative assessment methods that can be applied in practice and clinical trials are not readily available. We summarize here a comprehensive literature search and the discussion at a recent international meeting of investigators involved in the development and study of visual outcomes in multiple sclerosis, which had, as its overriding goals, to review the state of the field and identify areas for future research. We review data and principles to help us understand the importance of vision as a model for outcomes assessment in clinical practice and therapeutic trials in multiple sclerosis. PMID:25433914

  15. Cooperative and asynchronous stereo vision for dynamic vision sensors

    International Nuclear Information System (INIS)

    Dynamic vision sensors (DVSs) encode visual input as a stream of events generated upon relative light intensity changes in the scene. These sensors have the advantage of allowing simultaneously high temporal resolution (better than 10 µs) and wide dynamic range (>120 dB) at sparse data representation, which is not possible with clocked vision sensors. In this paper, we focus on the task of stereo reconstruction. The spatiotemporal and asynchronous aspects of data provided by the sensor impose a different stereo reconstruction approach from the one applied for synchronous frame-based cameras. We propose to model the event-driven stereo matching by a cooperative network (Marr and Poggio 1976 Science 194 283–7). The history of the recent activity in the scene is stored in the network, which serves as spatiotemporal context used in disparity calculation for each incoming event. The network constantly evolves in time, as events are generated. In our work, not only the spatiotemporal aspect of the data is preserved but also the matching is performed asynchronously. The results of the experiments prove that the proposed approach is well adapted for DVS data and can be successfully used for disparity calculation. (paper)

  16. Women and the vision thing.

    Science.gov (United States)

    Ibarra, Herminia; Obodaru, Otilia

    2009-01-01

    Are women rated lower than men in evaluations of their leadership capabilities because of lingering gender bias? No, according to an analysis of thousands of 360-degree assessments collected by Insead's executive education program. That analysis showed that women tend to outshine men in all areas but one: vision. Unfortunately, that exception is a big one. At the top tiers of management, the ability to see opportunities, craft strategy based on a broad view of the business, and inspire others is a must-have. To explore the nature of the deficit, and whether it is a perception or reality, Insead professor Ibarra and doctoral candidate Obodaru interviewed female executives and studied the evaluation data. They developed three possible explanations. First, women may do just as much as men to shape the future but go about it in a different way; a leader who is less directive, includes more people, and shares credit might not fit people's mental model of a visionary. Second, women may believe they have less license to go out on a limb. Those who have built careers on detail-focused, shoulder-to-the-wheel execution may hesitate to stray from facts into unprovable assertions about the future. Third, women may choose not to cultivate reputations as big visionaries. Having seen bluster passed off as vision, they may dismiss the importance of selling visions. The top two candidates for the Democratic nomination for U.S. president in 2008 offer an instructive parallel. The runner-up, Hillary Clinton, was viewed as a get-it-done type with an impressive, if uninspiring, grasp of policy detail. The winner, Barack Obama, was seen as a charismatic visionary offering a hopeful, if undetailed, future. The good news is that every dimension of leadership is learned, not inborn. As more women become skilled at, and known for, envisioning the future, nothing will hold them back. PMID:19227409

  17. Information Society Visions in the Nordic Countries

    DEFF Research Database (Denmark)

    Henten, Anders; Kristensen, Thomas Myrup

    2000-01-01

    This paper analyses the information society visions put forward by the governments/administrations of the Nordic countries and compares them to the visions advanced at the EU-level. The paper suggests that the information society visions constitute a kind of common ideology for almost the whole p...... political spectrum although it is characterised by a high degree of neo-liberal thinking. It is further argued that there is no distinctly Nordic model for an information society....

  18. Expert system modeling of a vision system

    Science.gov (United States)

    Reihani, Kamran; Thompson, Wiley E.

    1992-05-01

    The proposed artificial intelligence-based vision model incorporates natural recognition processes depicted as a visual pyramid and hierarchical representation of objects in the database. The visual pyramid, with based and apex representing pixels and image, respectively, is used as an analogy for a vision system. This paper provides an overview of recognition activities and states in the framework of an inductive model. Also, it presents a natural vision system and a counterpart expert system model that incorporates the described operations.

  19. Participative Action Research: The Vision Conference

    OpenAIRE

    René Victor Valqui Vidal

    2003-01-01

    This paper presents the principles behind the design and management of the Vision Conference: a one-day workshop for a large group of participants endeavoured to create ideas, projects and visions for the future activities of a local community or an organisation. A case study from a local community in Denmark is also presented with the purpose of illustrating the organisation, planning and management of a Vision Conference. The paper focuses in the three central social processes of the confer...

  20. Prevalence of Color Vision Deficiency in Qazvin

    OpenAIRE

    Mohammad khalaj; Ameneh Barikani; Mozhgan Mohammadi

    2014-01-01

    Background: Color vision deficiency (CVD) is an X chromosome-linked recessive autosomal dominant. Determine the prevalence of color blindness in Qazvin population. Materials and Methods: In a cross sectional study color vision deficiency examined in 1853 individuals with age 10-25 years old who participated in private clinics and eye clinic of Bu-Ali hospital in Qazvin in 2010. The screening of color vision deficiency was performed using Ishihara test. Data were analyzed by SPSS-16 with χP...

  1. Night vision: changing the way we drive

    Science.gov (United States)

    Klapper, Stuart H.; Kyle, Robert J. S.; Nicklin, Robert L.; Kormos, Alexander L.

    2001-03-01

    A revolutionary new Night Vision System has been designed to help drivers see well beyond their headlights. From luxury automobiles to heavy trucks, Night Vision is helping drivers see better, see further, and react sooner. This paper describes how Night Vision Systems are being used in transportation and their viability for the future. It describes recent improvements to the system currently in the second year of production. It also addresses consumer education and awareness, cost reduction, product reliability, market expansion and future improvements.

  2. Robust Machine Vision for Service Robotics

    OpenAIRE

    Grigorescu, Sorin Mihai

    2010-01-01

    In this thesis the vision architecture ROVIS (RObust machine VIsion for Service robotics ) is suggested. The purpose of the architecture is to improve the robustness and accuracy of visual perceptual capabilities of service robotic systems. In comparison to traditional industrial robot vision where the working environment is predefined, service robots have to cope with variable illumination conditions and cluttered scenes. The key concept for robustness in this thesis is the inclusion of feed...

  3. Unsupervised relational feature learning for vision

    OpenAIRE

    Konda, Kishore Reddy

    2016-01-01

    This thesis contributes to the field of machine learning with a specific focus on the methods for learning relations between the inputs. Learning relationships between images is the most common primitive in vision. There are many vision tasks in which relationships across images play an important role. Some of them are motion estimation, activity recognition, stereo vision, multi-view geometry and visual odometry. Many of such tasks mainly depend on motion and disparity cues, which are in...

  4. Special Issue on Robot Vision

    OpenAIRE

    Košecká, Jana; Marchand, Eric; Corke, Peter

    2015-01-01

    International audience The International Journal of Robotics Research (IJRR) has a long history of publishing the state-of-the-art in the field of robotic vision. This is the fourth special issue devoted to the topic. Previous special issues were published in. In a closely related field was the special issue on Visual Servoing published in IJRR, 2003 (Volume 22, Nos 10–11). These issues nicely summarize the highlights and progress of the past 12 years of research devoted to the use of visu...

  5. ASCI's Vision for supercomputing future

    International Nuclear Information System (INIS)

    The full text of publication follows. Advanced Simulation and Computing (ASC, formerly Accelerated Strategic Computing Initiative [ASCI]) was established in 1995 to help Defense Programs shift from test-based confidence to simulation-based confidence. Specifically, ASC is a focused and balanced program that is accelerating the development of simulation capabilities needed to analyze and predict the performance, safety, and reliability of nuclear weapons and certify their functionality - far exceeding what might have been achieved in the absence of a focused initiative. To realize its vision, ASC is creating simulation and proto-typing capabilities, based on advanced weapon codes and high-performance computing

  6. Convergence insufficiency and vision therapy.

    Science.gov (United States)

    McGregor, Mary Lou

    2014-06-01

    There is no standard meaning of the term "vision therapy", and for this reason it is often a controversial topic between some members of the ophthalmic and optometric community. Most pediatric ophthalmologists avoid using the term because it is nonspecific. Convergence Insufficiency (CI) is a binocular visual problem that causes problems and symptoms with near fixation. There is consensus among eye care professionals that convergence therapy is effective in treating CI. Convergence therapy is not effective in treating learning disabilities, but can sometimes relieve symptoms that might be a barrier to reading. PMID:24852157

  7. Computer vision for smart library

    OpenAIRE

    Trček, Matej

    2016-01-01

    Hands-free interfaces allow us to comfortably integrate technology into mundane tasks. This thesis describes the development of an application for book cover recognition using an RGBD camera for use in a smart library. The application detects a plane within the depth image, finds the corners of a rectangle within it and alligns it with the camera plane. Computer vision techniques are used to compare the recorded image with a prepared database of book covers to find the best match. The depth i...

  8. Ethics in Darwin's melancholy vision.

    Science.gov (United States)

    Brown, Bryson

    2011-03-01

    Darwinian natural selection draws on Malthus' harsh vision of human society to explain how organisms come to be adapted to their environments. Natural selection produces the appearance of teleology, but requires only efficient causal processes: undirected, heritable variation combined with effects of the variations on survival and reproduction. This paper draws a sharp distinction between the resulting form of backwards-directed teleology and the future-directed teleology we ascribe to intentional human activity. Rather than dismiss teleology as mere illusion, the paper concludes with an account of how future-directed teleology came to be a justifiable part of how we understand ourselves. PMID:21300312

  9. Early vision and visual attention

    Directory of Open Access Journals (Sweden)

    Gvozdenović Vasilije P.

    2003-01-01

    Full Text Available The question whether visual perception is spontaneous, sudden or is running through several phases, mediated by higher cognitive processes, was raised ever since the early work of Gestalt psychologists. In the early 1980s, Treisman proposed the feature integration theory of attention (FIT, based on the findings of neuroscience. Soon after publishing her theory a new scientific approach appeared investigating several visual perception phenomena. The most widely researched were the key constructs of FIT, like types of visual search and the role of the attention. The following review describes the main studies of early vision and visual attention.

  10. Three-dimensional vision system

    International Nuclear Information System (INIS)

    This paper presents a model-based three-dimensional (3-D) object recognition system for an autonomous robot. 3-D information is reconstructed by means of passive trinocular stereo vision. 3-D physical edges are then extracted and linked to obtain scene description features. The representations of 3-D objects are built by using an extended solid model. Shape matching is performed by matching prominent features with those of stored models. The results of partial shape matching are used to determine the orientation and the location of the object in 3-D space. Experimental results using a real object show that the system is effective. (author)

  11. Industrial Combustion Vision: A Vision by and for the Industrial Combustion Community

    Energy Technology Data Exchange (ETDEWEB)

    none,

    1998-05-01

    The Industrial Combustion Vision is the result of a collaborative effort by manufacturers and users of burners, boilers, furnaces, and other process heating equipment. The vision sets bold targets for tomorrow's combustion systems.

  12. Applications of AI, machine vision and robotics

    CERN Document Server

    Boyer, Kim; Bunke, H

    1995-01-01

    This text features a broad array of research efforts in computer vision including low level processing, perceptual organization, object recognition and active vision. The volume's nine papers specifically report on topics such as sensor confidence, low level feature extraction schemes, non-parametric multi-scale curve smoothing, integration of geometric and non-geometric attributes for object recognition, design criteria for a four degree-of-freedom robot head, a real-time vision system based on control of visual attention and a behavior-based active eye vision system. The scope of the book pr

  13. Color in Computer Vision Fundamentals and Applications

    CERN Document Server

    Gevers, Theo; van de Weijer, Joost; Geusebroek, Jan-Mark

    2012-01-01

    While the field of computer vision drives many of today’s digital technologies and communication networks, the topic of color has emerged only recently in most computer vision applications. One of the most extensive works to date on color in computer vision, this book provides a complete set of tools for working with color in the field of image understanding. Based on the authors’ intense collaboration for more than a decade and drawing on the latest thinking in the field of computer science, the book integrates topics from color science and computer vision, clearly linking theor

  14. A Performance Review of 3D TOF Vision Systems in Comparison to Stereo Vision Systems

    OpenAIRE

    Hussmann, Stephan; Ringbeck, Thorsten; Hagebeuker, Bianca

    2008-01-01

    In this chapter we compared conventional stereo vision systems with time-of-flight vision system and highlighted the advantages and disadvantages of both systems. The new PMD technology represents a TOF vision system with many advantages in comparison to conventional stereo vision systems especially in the automotive industry. The equations needed for the design of such a system are derived and demonstrate the simplicity of the

  15. Bringing Vision-Based Measurements into our Daily Life: A Grand Challenge for Computer Vision Systems

    OpenAIRE

    Scharcanski, Jacob

    2016-01-01

    Bringing computer vision into our daily life has been challenging researchers in industry and in academia over the past decades. However, the continuous development of cameras and computing systems turned computer vision-based measurements into a viable option, allowing new solutions to known problems. In this context, computer vision is a generic tool that can be used to measure and monitor phenomena in wide range of fields. The idea of using vision-based measurements is appealing, since the...

  16. Bio-Inspired Computer Vision: Towards a Synergistic Approach of Artificial and Biological Vision

    OpenAIRE

    Medathati, N. V. Kartheek; Neumann, Heiko; Masson, Guillaume,; Kornprobst, Pierre

    2016-01-01

    International audience Studies in biological vision have always been a great source of inspiration for design of computer vision algorithms. In the past, several successful methods were designed with varying degrees of correspondence with biological vision studies, ranging from purely functional inspiration to methods that utilise models that were primarily developed for explaining biological observations. Even though it seems well recognised that computational models of biological vision ...

  17. Managing Dreams and Ambitions: A Psychological Analysis of Vision Communication

    NARCIS (Netherlands)

    D.A. Stam (Daan)

    2008-01-01

    textabstractThe communication of inspiring visions is arguably the sine qua non of change-oriented leadership. Visions are images of the future. Vision communication refers to the expression of a vision with the aim of convincing others (usually followers) that the vision is valid. Despite the fact

  18. Low Vision Care: The Need to Maximise Visual Potential

    Directory of Open Access Journals (Sweden)

    Ramachandra Pararajasegaram

    2004-01-01

    Full Text Available People with low vision have residual vision with some light perception, but their vision loss does not lend itself to improvement by standard spectacles or medical or surgical treatment. Such persons have the potential for enhanced functional vision if they receive appropriate low vision care services.

  19. 78 FR 12815 - Qualification of Drivers; Exemption Applications; Vision

    Science.gov (United States)

    2013-02-25

    ... FR 82132), or you may visit http://www.gpo.gov/fdsys/pkg/FR-2010-12-29/pdf/2010-32876.pdf . FOR... ophthalmologist noted, ``Commercial truck driver, good color vision, 180 degrees of peripheral vision, no medical... vision, good color vision, and a good field of vision when using both eyes. His condition is stable...

  20. Vision as a user interface

    Science.gov (United States)

    Koenderink, Jan

    2011-03-01

    The egg-rolling behavior of the graylag goose is an often quoted example of a fixed-action pattern. The bird will even attempt to roll a brick back to its nest! Despite excellent visual acuity it apparently takes a brick for an egg." Evolution optimizes utility, not veridicality. Yet textbooks take it for a fact that human vision evolved so as to approach veridical perception. How do humans manage to dodge the laws of evolution? I will show that they don't, but that human vision is an idiosyncratic user interface. By way of an example I consider the case of pictorial perception. Gleaning information from still images is an important human ability and is likely to remain so for the foreseeable future. I will discuss a number of instances of extreme non-veridicality and huge inter-observer variability. Despite their importance in applications (information dissemination, personnel selection,...) such huge effects have remained undocumented in the literature, although they can be traced to artistic conventions. The reason appears to be that conventional psychophysics-by design-fails to address the qualitative, that is the meaningful, aspects of visual awareness whereas this is the very target of the visual arts.

  1. Early vision and focal attention

    Science.gov (United States)

    Julesz, Bela

    1991-07-01

    At the thirty-year anniversary of the introduction of the technique of computer-generated random-dot stereograms and random-dot cinematograms into psychology, the impact of the technique on brain research and on the study of artificial intelligence is reviewed. The main finding-that stereoscopic depth perception (stereopsis), motion perception, and preattentive texture discrimination are basically bottom-up processes, which occur without the help of the top-down processes of cognition and semantic memory-greatly simplifies the study of these processes of early vision and permits the linking of human perception with monkey neurophysiology. Particularly interesting are the unexpected findings that stereopsis (assumed to be local) is a global process, while texture discrimination (assumed to be a global process, governed by statistics) is local, based on some conspicuous local features (textons). It is shown that the top-down process of "shape (depth) from shading" does not affect stereopsis, and some of the models of machine vision are evaluated. The asymmetry effect of human texture discrimination is discussed, together with recent nonlinear spatial filter models and a novel extension of the texton theory that can cope with the asymmetry problem. This didactic review attempts to introduce the physicist to the field of psychobiology and its problems-including metascientific problems of brain research, problems of scientific creativity, the state of artificial intelligence research (including connectionist neural networks) aimed at modeling brain activity, and the fundamental role of focal attention in mental events.

  2. VISION 21 SYSTEMS ANALYSIS METHODOLOGIES

    Energy Technology Data Exchange (ETDEWEB)

    G.S. Samuelsen; A. Rao; F. Robson; B. Washom

    2003-08-11

    Under the sponsorship of the U.S. Department of Energy/National Energy Technology Laboratory, a multi-disciplinary team led by the Advanced Power and Energy Program of the University of California at Irvine is defining the system engineering issues associated with the integration of key components and subsystems into power plant systems that meet performance and emission goals of the Vision 21 program. The study efforts have narrowed down the myriad of fuel processing, power generation, and emission control technologies to selected scenarios that identify those combinations having the potential to achieve the Vision 21 program goals of high efficiency and minimized environmental impact while using fossil fuels. The technology levels considered are based on projected technical and manufacturing advances being made in industry and on advances identified in current and future government supported research. Included in these advanced systems are solid oxide fuel cells and advanced cycle gas turbines. The results of this investigation will serve as a guide for the U. S. Department of Energy in identifying the research areas and technologies that warrant further support.

  3. Spatial Vision in Bombus terrestris.

    Science.gov (United States)

    Chakravarthi, Aravin; Baird, Emily; Dacke, Marie; Kelber, Almut

    2016-01-01

    Bombus terrestris is one of the most commonly used insect models to investigate visually guided behavior and spatial vision in particular. Two fundamental measures of spatial vision are spatial resolution and contrast sensitivity. In this study, we report the threshold of spatial resolution in B. terrestris and characterize the contrast sensitivity function of the bumblebee visual system for a dual choice discrimination task. We trained bumblebees in a Y-maze experimental set-up to associate a vertical sinusoidal grating with a sucrose reward, and a horizontal grating with absence of a reward. Using a logistic psychometric function, we estimated a resolution threshold of 0.21 cycles deg(-1) of visual angle. This resolution is in the same range but slightly lower than that found in honeybees (Apis mellifera and A. cerana) and another bumblebee species (B. impatiens). We also found that the contrast sensitivity of B. terrestris was 1.57 for the spatial frequency 0.090 cycles deg(-1) and 1.26 for 0.18 cycles deg(-1). PMID:26912998

  4. Spatial vision in Bombus terrestris

    Directory of Open Access Journals (Sweden)

    Aravin eChakravarthi

    2016-02-01

    Full Text Available Bombus terrestris is one of the most commonly used insect models to investigate visually guided behavior and spatial vision in particular. Two fundamental measures of spatial vision are spatial resolution and contrast sensitivity. In this study, we report the threshold of spatial resolution in B. terrestris and characterize the contrast sensitivity function of the bumblebee visual system for a dual choice discrimination task. We trained bumblebees in a Y-maze experimental set-up to associate a vertical sinusoidal grating with a sucrose reward, and a horizontal grating with absence of a reward. Using a logistic psychometric function, we estimated a resolution threshold of 0.21 cycles deg-1 of visual angle. This resolution is in the same range but slightly lower than that found in honeybees (Apis mellifera and A. cerana and another bumblebee species (B. impatiens. We also found that the contrast sensitivity of B. terrestris was 1.57 for the spatial frequency 0.09 cycles deg-1 and 1.26. for 0.18 cycles deg-1.

  5. Synthetic vision display evaluation studies

    Science.gov (United States)

    Regal, David M.; Whittington, David H.

    1994-01-01

    The goal of this research was to help us understand the display requirements for a synthetic vision system for the High Speed Civil Transport (HSCT). Four experiments were conducted to examine the effects of different levels of perceptual cue complexity in displays used by pilots in a flare and landing task. Increased levels of texture mapping of terrain and runway produced mixed results, including harder but shorter landings and a lower flare initiation altitude. Under higher workload conditions, increased texture resulted in an improvement in performance. An increase in familiar size cues did not result in improved performance. Only a small difference was found between displays using two patterns of high resolution texture mapping. The effects of increased perceptual cue complexity on performance was not as strong as would be predicted from the pilot's subjective reports or from related literature. A description of the role of a synthetic vision system in the High Speed Civil Transport is provide along with a literature review covering applied research related to perceptual cue usage in aircraft displays.

  6. Visions for Danish bio-ethanol; Visioner for dansk bioethanol

    Energy Technology Data Exchange (ETDEWEB)

    Ahring, B.K. [BioCentrum-DTU (Denmark); Felby, C. [Det Biovidenskabelige Fakultet -KU (Denmark); Jensen, Arne [Syddansk Univ., Ledelsessekretariatet (Denmark); Nielsen, Charles [DONG Energy (Denmark); Skytte, K. [Risoe National Lab., System Analysis Dept. - DTU (Denmark); Wormslev, E.C. [NIRAS A/S (Denmark); Zinck, A.M. [Dansk Landbrug (DK)] (eds.)

    2007-02-15

    In 2006 the Danish Academy of Technical Sciences set up a working group to prepare a brief and factual presentation of visions for Danish bioenergy targeted at political actors in that area. This report presents the working group's conclusions and recommendations with focus on bioethanol. Denmark has powerful actors and good opportunities to develop and commercialize this particular type of biofuel. Bioethanol has the potential to create large gains for Denmark within supply, environment and export, and the working group considers bioethanol to be the only alternative to petrol for the transport sector in the short term. However, in order to establish Denmark as a strong and relevant partner in international development, it is crucial for the Danish actors to concentrate on a joint effort. (BA)

  7. Reading by Children with Low Vision

    Science.gov (United States)

    Gompel, Marjolein; van Bon, Wim H. J.; Schreuder, Robert

    2004-01-01

    This study of the reading of text found that despite their lower reading speed on a reading-comprehension task, the children with low vision comprehended texts at least as well as did the sighted children. Children with low vision need more time to read and comprehend a text, but they seem to use this time with enough efficiency to process the…

  8. Literacy skills of children with low vision

    NARCIS (Netherlands)

    Gompel, M.

    2005-01-01

    The main question of the studies reported in this thesis is how the reading and spelling skills of children with low vision compare to those of their sighted peers, and which factors determine the variation in reading and spelling ability in children with low vision. In the study reported in chapter

  9. Tensors in image processing and computer vision

    CERN Document Server

    De Luis García, Rodrigo; Tao, Dacheng; Li, Xuelong

    2009-01-01

    Tensor signal processing is an emerging field with important applications to computer vision and image processing. This book presents the developments in this branch of signal processing, offering research and discussions by experts in the area. It is suitable for advanced students working in the area of computer vision and image processing.

  10. The Democratic Vision of Carl Schmitt

    DEFF Research Database (Denmark)

    Pedersen, Søren Hviid

    2013-01-01

    The main purpose of this paper is to justify two propositions. One, that Schmitt’s political vision is indeed democratic and second, that Schmitt’s democratic vision, plebiscitary or leadership democracy, is better adapted to our modern political condition and the challenges confronting modern...

  11. Stereo 3-D Vision in Teaching Physics

    Science.gov (United States)

    Zabunov, Svetoslav

    2012-01-01

    Stereo 3-D vision is a technology used to present images on a flat surface (screen, paper, etc.) and at the same time to create the notion of three-dimensional spatial perception of the viewed scene. A great number of physical processes are much better understood when viewed in stereo 3-D vision compared to standard flat 2-D presentation. The…

  12. Second Croatian Computer Vision Workshop (CCVW 2013)

    OpenAIRE

    Lončarić, Sven; Šegvić, Siniša

    2013-01-01

    Proceedings of the Second Croatian Computer Vision Workshop (CCVW 2013, http://www.fer.unizg.hr/crv/ccvw2013) held September 19, 2013, in Zagreb, Croatia. Workshop was organized by the Center of Excellence for Computer Vision of the University of Zagreb.

  13. Computer vision in the poultry industry

    Science.gov (United States)

    Computer vision is becoming increasingly important in the poultry industry due to increasing use and speed of automation in processing operations. Growing awareness of food safety concerns has helped add food safety inspection to the list of tasks that automated computer vision can assist. Researc...

  14. Vision: A Conceptual Framework for School Counselors

    Science.gov (United States)

    Watkinson, Jennifer Scaturo

    2013-01-01

    Vision is essential to the implementation of the American School Counselor Association (ASCA) National Model. Drawing from research in organizational leadership, this article provides a conceptual framework for how school counselors can incorporate vision as a strategy for implementing school counseling programs within the context of practice.…

  15. A vision for modernizing environmental risk assessment

    Science.gov (United States)

    In 2007, the US National Research Council (NRC) published a Vision and Strategy for [human health] Toxicity Testing in the 21st century. Central to the vision was increased reliance on high throughput in vitro testing and predictive approaches based on mechanistic understanding o...

  16. Low vision: we can all do more

    OpenAIRE

    Hasan Minto; Clare Gilbert

    2012-01-01

    Despite all the treatments, operations, and medication at our disposal, there is still a significant number of people whose sight we cannot fully restore.What happens to these patients once they leave our care? Without the necessary support, advice, and low vision devices, their remaining vision will not be very good; this can make life a struggle.

  17. THE ROLE OF OPTOMETRY IN VISION 2020

    OpenAIRE

    Holden, Brien A.; Serge Resnikoff

    2002-01-01

    The global initiative, Vision 2020: The Right to Sight, established by the World Health Organization (WHO) and the International Agency for the Prevention of Blindness, has created valuable and effective collaborations of organisations involved in a wide range of eyecare and community healthcare activities aimed at the elimination of avoidable blindness and impaired vision.

  18. Color Vision Deficits and Literacy Acquisition.

    Science.gov (United States)

    Hurley, Sandra Rollins

    1994-01-01

    Shows that color blindness, whether partial or total, inhibits literacy acquisition. Offers a case study of a third grader with impaired color vision. Presents a review of literature on the topic. Notes that people with color vision deficits are often unaware of the handicap. (RS)

  19. Field testing driver night vision devices

    NARCIS (Netherlands)

    Kooi, F.L.; Kolletzki, D.

    2007-01-01

    This paper summarizes the available methodologies to field test driver night vision devices ranging from vehicle mounted camera’s to head-mounted NVG’s. As in flight trials, a formidable challenge is to collect meaningful performance measures. Night vision systems for land and air systems show many

  20. Implementing Vision Research in Special Needs Education

    Science.gov (United States)

    Wilhelmsen, Gunvor Birkeland; Aanstad, Monica L.; Leirvik, Eva Iren B.

    2015-01-01

    This article presents experiences from vision research implemented in education and argues for the need for teachers with visual competence and insight into suitable methods for stimulation and learning. A new type of continuing professional development (CPD) focuses on the role of vision in children's learning and development, the consequences of…

  1. Color Vision Deficiencies in Children. United States.

    Science.gov (United States)

    National Center for Health Statistics (DHEW/PHS), Hyattsville, MD.

    Presented are prevalence data on color vision deficiencies (color blindness) in noninstitutionalized children, aged 6-11, in the United States, as estimated from the Health Examination Survey findings on a representative sample of over 7,400 children. Described are the two color vision tests used in the survey, the Ishihara Test for Color…

  2. What You Should Know (Low Vision)

    Science.gov (United States)

    ... of these include age-related macular degeneration (AMD), cataract, diabetes, and glaucoma. Eye injuries and birth defects are some other causes. Whatever the cause, lost vision cannot be restored. It can, however, be managed with proper treatment and vision rehabilitation. You should visit an eye ...

  3. 75 FR 22175 - Qualification of Drivers; Exemption Applications; Vision

    Science.gov (United States)

    2010-04-27

    ... Federal Motor Carrier Safety Administration Qualification of Drivers; Exemption Applications; Vision... Federal vision standard applicable to interstate truck and bus drivers and the reasons for the denials. FMCSA has statutory authority to exempt individuals from the vision requirement if the...

  4. 78 FR 76394 - Qualification of Drivers; Exemption Applications; Vision

    Science.gov (United States)

    2013-12-17

    ... Federal Motor Carrier Safety Administration Qualification of Drivers; Exemption Applications; Vision... Federal vision standard applicable to interstate truck and bus drivers and the reasons for the denials. FMCSA has statutory authority to exempt individuals from the vision requirement if the...

  5. 77 FR 12361 - Qualification of Drivers; Exemption Applications; Vision

    Science.gov (United States)

    2012-02-29

    ... Federal Motor Carrier Safety Administration Qualification of Drivers; Exemption Applications; Vision... Federal vision standard applicable to interstate truck and bus drivers and the reasons for the denials. FMCSA has statutory authority to exempt individuals from the vision requirement if the...

  6. 76 FR 69793 - Qualification of Drivers; Exemption Applications; Vision

    Science.gov (United States)

    2011-11-09

    ... Federal Motor Carrier Safety Administration Qualification of Drivers; Exemption Applications; Vision... Federal vision standard applicable to interstate truck and bus drivers and the reasons for the denials. FMCSA has statutory authority to exempt individuals from the vision requirement if the...

  7. 76 FR 25763 - Qualification of Drivers; Exemption Applications; Vision

    Science.gov (United States)

    2011-05-05

    ... Federal Motor Carrier Safety Administration Qualification of Drivers; Exemption Applications; Vision... Federal vision standard applicable to interstate truck and bus drivers and the reasons for the denials. FMCSA has statutory authority to exempt individuals from the vision requirement if the...

  8. To Your Health: NLM update transcript - Vision screening for seniors

    Science.gov (United States)

    ... of MedlinePlus.gov's vision impairment and blindness health topic page . MedlinePlus.gov's vision impairment and blindness health topic page provides specific information for seniors with vision challenges ...

  9. Dense image correspondences for computer vision

    CERN Document Server

    Liu, Ce

    2016-01-01

    This book describes the fundamental building-block of many new computer vision systems: dense and robust correspondence estimation. Dense correspondence estimation techniques are now successfully being used to solve a wide range of computer vision problems, very different from the traditional applications such techniques were originally developed to solve. This book introduces the techniques used for establishing correspondences between challenging image pairs, the novel features used to make these techniques robust, and the many problems dense correspondences are now being used to solve. The book provides information to anyone attempting to utilize dense correspondences in order to solve new or existing computer vision problems. The editors describe how to solve many computer vision problems by using dense correspondence estimation. Finally, it surveys resources, code, and data necessary for expediting the development of effective correspondence-based computer vision systems.   ·         Provides i...

  10. Vision based systems for UAV applications

    CERN Document Server

    Kuś, Zygmunt

    2013-01-01

    This monograph is motivated by a significant number of vision based algorithms for Unmanned Aerial Vehicles (UAV) that were developed during research and development projects. Vision information is utilized in various applications like visual surveillance, aim systems, recognition systems, collision-avoidance systems and navigation. This book presents practical applications, examples and recent challenges in these mentioned application fields. The aim of the book is to create a valuable source of information for researchers and constructors of solutions utilizing vision from UAV. Scientists, researchers and graduate students involved in computer vision, image processing, data fusion, control algorithms, mechanics, data mining, navigation and IC can find many valuable, useful and practical suggestions and solutions. The latest challenges for vision based systems are also presented.

  11. Prevalence of Color Vision Deficiency in Qazvin

    Directory of Open Access Journals (Sweden)

    Mohammad khalaj

    2014-01-01

    Full Text Available Background: Color vision deficiency (CVD is an X chromosome-linked recessive autosomal dominant. Determine the prevalence of color blindness in Qazvin population. Materials and Methods: In a cross sectional study color vision deficiency examined in 1853 individuals with age 10-25 years old who participated in private clinics and eye clinic of Bu-Ali hospital in Qazvin in 2010. The screening of color vision deficiency was performed using Ishihara test. Data were analyzed by SPSS-16 with χP2P test with p<0.05. Results: Mean age of participant was 17.86±4.48 years. 59.5% of them were female. 3.49% of the total population had color vision deficiency that 0.93% and 2.56% were female and male respectively. Conclusion: color vision deficiency must be noticed by decision makers in health field for screen planning.

  12. Soft Computing Techniques in Vision Science

    CERN Document Server

    Yang, Yeon-Mo

    2012-01-01

    This Special Edited Volume is a unique approach towards Computational solution for the upcoming field of study called Vision Science. From a scientific firmament Optics, Ophthalmology, and Optical Science has surpassed an Odyssey of optimizing configurations of Optical systems, Surveillance Cameras and other Nano optical devices with the metaphor of Nano Science and Technology. Still these systems are falling short of its computational aspect to achieve the pinnacle of human vision system. In this edited volume much attention has been given to address the coupling issues Computational Science and Vision Studies.  It is a comprehensive collection of research works addressing various related areas of Vision Science like Visual Perception and Visual system, Cognitive Psychology, Neuroscience, Psychophysics and Ophthalmology, linguistic relativity, color vision etc. This issue carries some latest developments in the form of research articles and presentations. The volume is rich of contents with technical tools ...

  13. Applying Machine Vision To Robotic Automation

    Science.gov (United States)

    Lee, Jay

    1987-10-01

    Machine vision is an integral part in industry automation. This paper will discuss the 3-D vision technology and its applications. A brief description of several turkey automation systems developed and being developed that using 3-D vision technology in the fields of inspection and robotic guidance&control will be presented. The applications range from advanced robotic technology in automotive car production to sophisticated robotic system for U.S. Navy and Air force. This 3-D vision measuring capability has proved to the versatile key to successfully implementing adaptively controlled robot motion and robot path. Other extension of the technology to provide 3-D volumetric sensing and research effort in integrating 3-D vision with CAD/CAM system are examined.

  14. Development of Moire machine vision

    Science.gov (United States)

    Harding, Kevin G.

    1987-01-01

    Three dimensional perception is essential to the development of versatile robotics systems in order to handle complex manufacturing tasks in future factories and in providing high accuracy measurements needed in flexible manufacturing and quality control. A program is described which will develop the potential of Moire techniques to provide this capability in vision systems and automated measurements, and demonstrate artificial intelligence (AI) techniques to take advantage of the strengths of Moire sensing. Moire techniques provide a means of optically manipulating the complex visual data in a three dimensional scene into a form which can be easily and quickly analyzed by computers. This type of optical data manipulation provides high productivity through integrated automation, producing a high quality product while reducing computer and mechanical manipulation requirements and thereby the cost and time of production. This nondestructive evaluation is developed to be able to make full field range measurement and three dimensional scene analysis.

  15. MR imaging and computer vision

    International Nuclear Information System (INIS)

    To parallel the rapid progress in MR data acquisition, the authors have developed advanced computer vision methods specifically adapted to the multidimensional and multispectral (T1- and T2-weighted) nature of MR data to extract, analyze, and visualize the morphologic properties of biologic tissues. A multistage image processing scheme is proposed, which performs the three-dimensional (3D) segmentation of the brain (gray and white matter) and ventricular system from two-echo MR volume data with only minimal user interaction. The quality of the segmentation demonstrates the high potential of MR acquisition along with 3D segmentation and 3D visualization for diagnosis, preoperative planning, and research. With segmentation, a fully quantitative 3D exploration is accessible

  16. Bioinspired vision sensors with hyperacuity

    Science.gov (United States)

    Barrett, Steven F.; Wright, Cameron H. G.

    2011-04-01

    Musca domestica, the common house fly, possesses a powerful vision system that exhibits features such as fast, analog, parallel operation and motion hyperacuity -- the ability to detect the movement of objects at far better resolution than predicted by their photoreceptor spacing. Researchers at the Wyoming Information, Signal Processing, and Robotics (WISPR) Laboratory have investigated these features for over a decade to develop an analog sensor inspired by the fly. Research efforts have been divided into electrophysiology; mathematical, optical and MATLAB based sensor modeling; physical sensor development; and applications. This paper will provide an in depth review of recent key results in some of these areas including development of a multiple, light adapting cartridge based sensor constructed on both a planar and co-planar surface using off-the-shelf components. Both a photodiode-based approach and a fiber based sensor will be discussed. Applications in UAV obstacle avoidance, long term building monitoring and autonomous robot navigation are also discussed.

  17. New Media Vision for IYA

    Science.gov (United States)

    Gay, P. L.; Koppelman, M.

    2008-11-01

    The International Year of Astronomy New Media Committee seeks to provide and promote online astronomy experiences in the places that people work, play and learn; create content that will expose people to astronomy, provide them regular content, and create special opportunities for learning; distribute content for active (pull) and passive (push) channels and through guerilla marketing technique; use a diverse suite of technologies to reach people on multiple platforms and in diverse online settings. To make these goals a reality we have brought together a diverse group of astronomy new media practitioners to both mentor grass roots efforts and spearhead national initiatives. You are invited to partner you programs with the New Media Task Group. In this paper we lay out are goals and define our vision.

  18. Development of Moire machine vision

    Science.gov (United States)

    Harding, Kevin G.

    1987-10-01

    Three dimensional perception is essential to the development of versatile robotics systems in order to handle complex manufacturing tasks in future factories and in providing high accuracy measurements needed in flexible manufacturing and quality control. A program is described which will develop the potential of Moire techniques to provide this capability in vision systems and automated measurements, and demonstrate artificial intelligence (AI) techniques to take advantage of the strengths of Moire sensing. Moire techniques provide a means of optically manipulating the complex visual data in a three dimensional scene into a form which can be easily and quickly analyzed by computers. This type of optical data manipulation provides high productivity through integrated automation, producing a high quality product while reducing computer and mechanical manipulation requirements and thereby the cost and time of production. This nondestructive evaluation is developed to be able to make full field range measurement and three dimensional scene analysis.

  19. Principles of modern low vision rehabilitation.

    Science.gov (United States)

    Markowitz, Samuel N

    2006-06-01

    Low vision rehabilitation is a new emerging subspecialty drawing from the traditional fields of ophthalmology, optometry, occupational therapy, and sociology, with an ever-increasing impact on our customary concepts of research, education, and services for the visually impaired patient. A multidisciplinary approach and coordinated effort are necessary to take advantage of new scientific advances and achieve optimal results for the patient. Accordingly, the intent of this paper is to outline the principles and details of a modern low vision rehabilitation service. All rehabilitation attempts must start with a first hand interview (the intake) for assessing functionality and priority tasks for rehabilitation, as well as assessing the patient's all-important cognitive skills. The assessment of residual visual functions follows the intake and offers a unique opportunity to measure, evaluate, and document accurately the extent of functional loss sustained by the patient from disease. An accurate assessment of residual visual functions includes assessment of visual acuity, contrast sensitivity, binocularity, refractive errors, perimetry, oculomotor functions, cortical visual integration, and light characteristics affecting visual functions. Functional vision assessment in low vision rehabilitation measures how well one uses residual visual functions to perform routine tasks, using different items under various conditions, throughout the day. Of the many functional vision skills known, reading skills is an obligatory item for all low vision rehabilitation assessments. Results of assessment guide rehabilitation professionals in developing rehabilitation plans for the individual and recommending appropriate low vision devices. The outcome from assessing residual visual functions is detection of visual functions that can be improved with the use of optical devices. Methods for prescribing devices such as image relocation with prisms to a preferred retinal locus, field

  20. LATE VISION: PROCESSES AND EPISTEMIC STATUS

    Directory of Open Access Journals (Sweden)

    Athanassios eRaftopoulos

    2011-12-01

    Full Text Available In this paper, I examine the processes that occur in late vision and address the problem of whether late vision should be construed as a properly speaking perceptual stage, or as a thought-like discursive stage. Specifically, I argue that late vision, its (partly conceptual nature notwithstanding, neither is constituted by nor does it implicate what I call pure thoughts, that is, propositional structures that are formed in the cognitive areas of the brain through, and participate in, discursive reasoning and inferences. At the same time, the output of late vision, namely an explicit belief concerning the identity and category membership of an object (that is, a recognitional belief or its features, eventually enters into discursive reasoning. Using Jackendoff’s distinction between visual awareness, which characterizes perception, and visual understanding, which characterizes pure thought, I claim that the contents of late vision belong to visual awareness and not to visual understanding and that although late vision implicates beliefs, either implicit or explicit, these beliefs are hybrid visual/conceptual constructs and not pure thoughts. Distinguishing between these hybrid representations and pure thoughts and delineating the nature of the representations of late vision lays the ground for examining, among other things, the process of conceptualization that occurs in visual processing and the way concepts modulate perceptual content affecting either its representational or phenomenal character. I also do not discuss the epistemological relations between the representations of late vision and the perceptual judgments they ‘support’, or ‘guide’ or ‘render possible’ or ‘evidence’ or ‘entitle’. However, the specification of the epistemology of late vision lays the ground for attacking that problem as well.

  1. Stereo vision with distance and gradient recognition

    Science.gov (United States)

    Kim, Soo-Hyun; Kang, Suk-Bum; Yang, Tae-Kyu

    2007-12-01

    Robot vision technology is needed for the stable walking, object recognition and the movement to the target spot. By some sensors which use infrared rays and ultrasonic, robot can overcome the urgent state or dangerous time. But stereo vision of three dimensional space would make robot have powerful artificial intelligence. In this paper we consider about the stereo vision for stable and correct movement of a biped robot. When a robot confront with an inclination plane or steps, particular algorithms are needed to go on without failure. This study developed the recognition algorithm of distance and gradient of environment by stereo matching process.

  2. Machine vision for real time orbital operations

    Science.gov (United States)

    Vinz, Frank L.

    1988-01-01

    Machine vision for automation and robotic operation of Space Station era systems has the potential for increasing the efficiency of orbital servicing, repair, assembly and docking tasks. A machine vision research project is described in which a TV camera is used for inputing visual data to a computer so that image processing may be achieved for real time control of these orbital operations. A technique has resulted from this research which reduces computer memory requirements and greatly increases typical computational speed such that it has the potential for development into a real time orbital machine vision system. This technique is called AI BOSS (Analysis of Images by Box Scan and Syntax).

  3. Color in machine vision and its application

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Color is the phenomenon of human visual perception and the module of machine vision. Color information is widely used in the areas of virtual reality and humancomputer interaction. Color is the product of a visual environment, illumination and the human brain. Research on color information representation and its processing is typically interdisciplinary. Based on our research work on human color perception and machine color vision and its application, we summarized the hotspots of color studies in recent developments and new approaches to color vision,including basic theories and the application of color information in virtual reality, content-based image retrieval, and face recognition.

  4. Computer vision based room interior design

    Science.gov (United States)

    Ahmad, Nasir; Hussain, Saddam; Ahmad, Kashif; Conci, Nicola

    2015-12-01

    This paper introduces a new application of computer vision. To the best of the author's knowledge, it is the first attempt to incorporate computer vision techniques into room interior designing. The computer vision based interior designing is achieved in two steps: object identification and color assignment. The image segmentation approach is used for the identification of the objects in the room and different color schemes are used for color assignment to these objects. The proposed approach is applied to simple as well as complex images from online sources. The proposed approach not only accelerated the process of interior designing but also made it very efficient by giving multiple alternatives.

  5. Progress in color night vision

    Science.gov (United States)

    Toet, Alexander; Hogervorst, Maarten A.

    2012-01-01

    We present an overview of our recent progress and the current state-of-the-art techniques of color image fusion for night vision applications. Inspired by previously developed color opponent fusing schemes, we initially developed a simple pixel-based false color-mapping scheme that yielded fused false color images with large color contrast and preserved the identity of the input signals. This method has been successfully deployed in different areas of research. However, since this color mapping did not produce realistic colors, we continued to develop a statistical color-mapping procedure that would transfer the color distribution of a given example image to a multiband nighttime image. This procedure yields a realistic color rendering. However, it is computationally expensive and achieves no color constancy since the mapping depends on the relative amounts of the different materials in the scene. By applying the statistical mapping approach in a color look-up-table framework, we finally achieved both color constancy and computational simplicity. This sample-based color transfer method is specific for different types of materials in a scene and can be easily adapted for the intended operating theatre and the task at hand. The method can be implemented as a look-up-table transform and is highly suitable for real-time implementations.

  6. Bayesian Vision for Shape Recovery

    Science.gov (United States)

    Jalobeanu, Andre

    2004-01-01

    We present a new Bayesian vision technique that aims at recovering a shape from two or more noisy observations taken under similar lighting conditions. The shape is parametrized by a piecewise linear height field, textured by a piecewise linear irradiance field, and we assume Gaussian Markovian priors for both shape vertices and irradiance variables. The observation process. also known as rendering, is modeled by a non-affine projection (e.g. perspective projection) followed by a convolution with a piecewise linear point spread function. and contamination by additive Gaussian noise. We assume that the observation parameters are calibrated beforehand. The major novelty of the proposed method consists of marginalizing out the irradiances considered as nuisance parameters, which is achieved by Laplace approximations. This reduces the inference to minimizing an energy that only depends on the shape vertices, and therefore allows an efficient Iterated Conditional Mode (ICM) optimization scheme to be implemented. A Gaussian approximation of the posterior shape density is computed, thus providing estimates both the geometry and its uncertainty. We illustrate the effectiveness of the new method by shape reconstruction results in a 2D case. A 3D version is currently under development and aims at recovering a surface from multiple images, reconstructing the topography by marginalizing out both albedo and shading.

  7. VISION BASED ENTOMOLOGY: A SURVEY

    Directory of Open Access Journals (Sweden)

    Siti Noorul Asiah Hassan

    2014-02-01

    Full Text Available Entomology has been deeply rooted in various cultures since prehistoric times for the purpose of agriculture. Nowadays, many scientists are interested in the field of biodiversity in order to maintain the diversity of species within our ecosystem. Out of 1.3 million known species on this earth, insects account for more than two thirds of these known species. Since 400 million years ago, there have been various kinds of interactions between humans and insects. There have been several attempts to create a method to perform insect identification accurately. Great knowledge and experience on entomology are required for accurate insect identification. Automation of insect identification is required because there is a shortage of skilled entomologists. This paper provides a review of the past literature in vision-based insect recognition and classifications. Over the past decades, automatic insect recognition and classification has been given extra attention especially in term of crop pest and disease control. This paper details advances in insect recognition, discussing representative works from different types of method and classifiers algorithm. Among the method used in the previous research includes color histogram, edge detection and feature extraction (SIFT vector. We provides discussion on the state-of-the-art and provides perspective on future research direction in insect recognition and classification problem.

  8. Low Vision Devices for the Home

    Medline Plus

    Full Text Available ... MRS. BROOKS: Okay. INSTRUCTOR: Right now, we have two sides to it. For a low vision person ... okay. INSTRUCTOR: Usually, we encourage people to use two, especially if you're going to be taking ...

  9. Low Vision Devices for the Home

    Medline Plus

    Full Text Available ... For a low vision person such as yourself, the black side against a light background would probably ... Okay. INSTRUCTOR: All right, let's move on to the stove. Our stove is marked with high marks ...

  10. Prevent Vision Loss with Early Diagnosis

    Medline Plus

    Full Text Available ... such as an ophthalmologist or optometrist. The exam will include a visual acuity test to determine if ... eye for early signs of disease signs that will occur long before loss of vision. A comprehensive ...

  11. Vision in our three-dimensional world

    Science.gov (United States)

    2016-01-01

    Many aspects of our perceptual experience are dominated by the fact that our two eyes point forward. Whilst the location of our eyes leaves the environment behind our head inaccessible to vision, co-ordinated use of our two eyes gives us direct access to the three-dimensional structure of the scene in front of us, through the mechanism of stereoscopic vision. Scientific understanding of the different brain regions involved in stereoscopic vision and three-dimensional spatial cognition is changing rapidly, with consequent influences on fields as diverse as clinical practice in ophthalmology and the technology of virtual reality devices. This article is part of the themed issue ‘Vision in our three-dimensional world’. PMID:27269595

  12. COMPUTER VISION SYNDROME: A SHORT REVIEW.

    Directory of Open Access Journals (Sweden)

    Sameena

    2012-12-01

    Full Text Available Computers are probably one of the biggest scientific inventions of the modern era, and since then they have become an integral part of our life. The increased usage of computers have lead to variety of ocular symptoms which includ es eye strain, tired eyes, irritation, redness, blurred vision, and diplopia, collectively referred to as Computer Vision Syndrome (CVS. CVS may have a significant impact not only on visual com fort but also occupational productivity since between 64% and 90% of computer users experienc e visual symptoms which may include eyestrain, headaches, ocular discomfort, dry eye, d iplopia and blurred vision either at near or when looking into the distance after prolonged comput er use KEY WORDS: Computer Vision Syndrome

  13. Computer vision for biomedical image applications. Proceedings

    International Nuclear Information System (INIS)

    This book constitutes the refereed proceedings of the First International Workshop on Computer Vision for Biomedical Image Applications: Current Techniques and Future Trends, CVBIA 2005, held in Beijing, China, in October 2005 within the scope of ICCV 20. (orig.)

  14. International Conference on Computational Vision and Robotics

    CERN Document Server

    2015-01-01

    Computer Vision and Robotic is one of the most challenging areas of 21st century. Its application ranges from Agriculture to Medicine, Household applications to Humanoid, Deep-sea-application to Space application, and Industry applications to Man-less-plant. Today’s technologies demand to produce intelligent machine, which are enabling applications in various domains and services. Robotics is one such area which encompasses number of technology in it and its application is widespread. Computational vision or Machine vision is one of the most challenging tools for the robot to make it intelligent.   This volume covers chapters from various areas of Computational Vision such as Image and Video Coding and Analysis, Image Watermarking, Noise Reduction and Cancellation, Block Matching and Motion Estimation, Tracking of Deformable Object using Steerable Pyramid Wavelet Transformation, Medical Image Fusion, CT and MRI Image Fusion based on Stationary Wavelet Transform. The book also covers articles from applicati...

  15. Understanding Your Vision: The "Imperfect Eye"

    Science.gov (United States)

    ... www.nihseniorhealth.gov (click on "Vision and Hearing") Astigmatism If you have astigmatism, the cornea is more oval than round. This doesn't allow the eye to focus clearly. Astigmatism is usually accompanied by nearsightedness or farsightedness. Treatment ...

  16. Integration of vision and robotic workcell

    Science.gov (United States)

    Bossieux, T. A.

    1994-01-01

    The paper discusses the incorporation of vision into a robotic cell to obtain cell status information and use this information to influence the robot operation. It discusses both mechanical and informational solutions to the operational issues which are present. The cell uses a machine vision system to determine information about part presence in the shipping tray, part location in the tray, and tray orientation. The vision system's edge detector algorithm is used to identify the orientation of the packing trays. In addition, different vision tools are used to determine if parts are present in the trays based on the unique configuration of the individual parts. The mechanical solutions discuss the handling of medium weight (10 - 25 lb.) parts at an average cycle time of 3.1 seconds per part. The robot gripper must handle 33 different models, three identical parts at a time. This is accomplished by using stacks of rotary actuators and slides between the stacks.

  17. Computer Vision Assisted Virtual Reality Calibration

    Science.gov (United States)

    Kim, W.

    1999-01-01

    A computer vision assisted semi-automatic virtual reality (VR) calibration technology has been developed that can accurately match a virtual environment of graphically simulated three-dimensional (3-D) models to the video images of the real task environment.

  18. Behavioral Risk Factors - Vision & Eye Health

    Data.gov (United States)

    U.S. Department of Health & Human Services — 2005-2014. In 2013 and subsequently, one question in the core of BRFSS asks about vision: Are you blind or do you have serious difficulty seeing, even when wearing...

  19. Genetics Home Reference: color vision deficiency

    Science.gov (United States)

    ... back-and-forth eye movements (nystagmus), and nearsightedness ( myopia ). Blue cone monochromacy is sometimes considered to be ... Red-green color vision defects have a lower incidence in almost all other populations studied. Blue-yellow ...

  20. Transfer color to night vision images

    Institute of Scientific and Technical Information of China (English)

    Shaoyuan Sun; Zhongliang Jing; Gang Liu; Zhenhua Li

    2005-01-01

    @@ Natural color appearance is the key problem of color night vision field. In this paper, the color mood of daytime color image is transferred to the monochromic night vision image. This method gives the night image a natural color appearance. For each pixel in the night vision image, the best matching pixel in the color image is found based on texture similarity measure. Entropy, energy, contrast, homogeneity, and correlation features based on co-occurrence matrix are combined as texture similarity measure to find the corresponding pixels between the two images. We use a genetic algorithm (GA) to find the optimistic weighting factors assigned to the five different features. GA is also employed in searching the matching pixels to make the color transfer algorithm faster. When the best matching pixel in the color image is found, the chromaticity values are transferred to the corresponding pixel of the night vision image. The experiment results demonstrate the efficiency of this natural color transfer technique.

  1. Color Vision Defects: What Teachers Should Know.

    Science.gov (United States)

    Lewis, Barbara A.; And Others

    1990-01-01

    Discusses the nature of color vision defects as they relate to reading instruction. Suggests ways that teachers can adapt instruction to help provide maximal learning opportunities for the color deficient child. (RS)

  2. Prevent Vision Loss with Early Diagnosis

    Medline Plus

    Full Text Available ... I'd noticed that sometimes, my vision seemed a little blurry and I decided to get it ... diabetic eye disease and that's what I discovered, a disease called diabetic retinopathy. It's a good thing ...

  3. Low Vision Devices for the Home

    Medline Plus

    Full Text Available ... INSTRUCTOR: Right now, we have two sides to it. For a low vision person such as yourself, ... should be able to feel a bump on it? MRS. BROOKS: Oh, I do. INSTRUCTOR: Okay, now ...

  4. Prevent Vision Loss with Early Diagnosis

    Medline Plus

    Full Text Available ... professional, such as an ophthalmologist or optometrist. The exam will include a visual acuity test to determine ... long before loss of vision. A comprehensive eye exam through dilated pupils at least once a year ...

  5. Vision systems for scientific and engineering applications

    International Nuclear Information System (INIS)

    Human performance can get degraded due to boredom, distraction and fatigue in vision-related tasks such as measurement, counting etc. Vision based techniques are increasingly being employed in many scientific and engineering applications. Notable advances in this field are emerging from continuing improvements in the fields of sensors and related technologies, and advances in computer hardware and software. Automation utilizing vision-based systems can perform repetitive tasks faster and more accurately, with greater consistency over time than humans. Electronics and Instrumentation Services Division has developed vision-based systems for several applications to perform tasks such as precision alignment, biometric access control, measurement, counting etc. This paper describes in brief four such applications. (author)

  6. Colombia, mining country. Vision a year 2019

    International Nuclear Information System (INIS)

    Scope of the state action for the mining sector, the performance of the mining sector, regional perceptions of mining development, construction of a long-term vision for the mining sector, the action plan and goals follow-up

  7. Robot vision for nuclear advanced robot

    International Nuclear Information System (INIS)

    This paper describes Robot Vision and Operation System for Nuclear Advanced Robot. This Robot Vision consists of robot position detection, obstacle detection and object recognition. With these vision techniques, a mobile robot can make a path and move autonomously along the planned path. The authors implemented the above robot vision system on the 'Advanced Robot for Nuclear Power Plant' and tested in an environment mocked up as nuclear power plant facilities. Since the operation system for this robot consists of operator's console and a large stereo monitor, this system can be easily operated by one person. Experimental tests were made using the Advanced Robot (nuclear robot). Results indicate that the proposed operation system is very useful, and can be operate by only person. (author)

  8. Vision 2030. A Vision for the U.S. Concrete Industry

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2001-01-01

    On September 27, 2000, the concrete industry's Strategic Development Council hosted a Concrete Vision Workshop in Chicago, Illinois. Meeting participants included over 50 concrete, cement, and other allied industry chief executive officers, presidents, vice-presidents, laboratory and industry research managers, and government representatives. Participants discussed the state of the concrete industry 30 years ago, the state of the current industry, and their vision for the United States concrete industry in 2030. Moreover, they identified specific goals to achieve the industry's Vision 2030. This document, Vision 2030, is the product of that workshop and the comments received after a broad industry review.

  9. Machine Vision Giving Eyes to Robots. Resources in Technology.

    Science.gov (United States)

    Technology Teacher, 1990

    1990-01-01

    This module introduces machine vision, which can be used for inspection, robot guidance and part sorting. The future for machine vision will include new technology and will bring vision systems closer to the ultimate vision processor, the human eye. Includes a student quiz, outcomes, and activities. (JOW)

  10. Information Fusion Methods in Computer Pan-vision System

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Aiming at concrete tasks of information fusion in computer pan-vision (CPV) system, information fusion methods are studied thoroughly. Some research progresses are presented. Recognizing of vision testing object is realized by fusing vision information and non-vision auxiliary information, which contain recognition of material defects, intelligent robot's autonomous recognition for parts and computer to defect image understanding and recognition automatically.

  11. Colour vision deficiency and physics teaching

    Science.gov (United States)

    Maule, Louise; Featonby, David

    2016-05-01

    1 in 12 males suffer from some form of colour vision deficiency (CVD) which in the present colour dominated world of education presentation can be a severe disadvantage. Although aware of ‘colourblindness’ most teachers make little or no adjustment for these pupils for whom tasks may be more difficult. This article examines colour vision deficiency and looks at ways in which we can help the many students who have this problem.

  12. Visions of Sustainability in Bioeconomy Research

    OpenAIRE

    Swinda F. Pfau; Janneke E. Hagens; Ben Dankbaar; Antoine J. M. Smits

    2014-01-01

    The rise of the bioeconomy is usually associated with increased sustainability. However, various controversies suggest doubts about this assumed relationship. The objective of this paper is to identify different visions and the current understanding of the relationship between the bioeconomy and sustainability in the scientific literature by means of a systematic review. After a search in several databases, 87 scientific journal articles were selected for review. Results show that visions abo...

  13. Developing organisational vision in general practice.

    OpenAIRE

    al-Shehri, A; Stanley, I; Thomas, P

    1993-01-01

    Vision is a fashionable but ill defined term in management circles. Nevertheless, it embodies a significant concept related to guiding an organisation from present realities, through opportunities and hazards, to a viable future. Until recently a typical general practice could assume a stable external environment, but now it is caught up in the uncertainties stemming from the NHS reforms. For such a practice to undertake effective strategic planning it will have to develop a vision connecting...

  14. INNOVATION OF ENTERPRISE VISION TOWARD SOCIAL RESPONSIBILITY

    OpenAIRE

    Tjaša Štrukelj; Matjaž Mulej; Simona Sternad

    2012-01-01

    Businesses need new bases and methods taking in account new values, culture, ethics, and norms (VCEN) of humans, leading both humans and businesses to their own requisite holism. This covers also enterprise governance and management and their predisposition to (responsible) enterprise vision (and resulting enterprise policy) we studied. Thus we are researching the formation and development of enterprise vision, the period and wholeness of which are relative. In our discussion we originated in...

  15. State of Vision Development in Slovenian Companies

    OpenAIRE

    Vojko Toman

    2014-01-01

    Vision is a prerequisite for efficient strategic planning and the effectiveness of a company. If a company has no vision (i.e., it does not know where it is heading), then it cannot build on advantages, eliminate weaknesses, exploit opportunities and avoid threats. The term ‘vision’ is often used in scientific and professional literature, but it should be noted that different authors understand the term differently and often discuss it inadequately. Many questions regarding the nature of visi...

  16. VISION- REQUIREMENT FOR A SUCCESSFUL LEADER

    OpenAIRE

    Angela - Olimpia Lobonea (Oltean)

    2014-01-01

    These people were called in the past chiefs, rulers. Now they are known as leaders. After management by objectives, strategic planning, project organization, this concept appears as a tool called "fourth generation". It is called VISION. Leadership and vision exist in the actual sense, which has become modern a few decades ago, managing to gather during this time a variety of scientific instruments. The connection between these two domains creates a certain type of leader, the ...

  17. Soft Computing Applications in Robotic Vision Systems

    OpenAIRE

    Ayala-Ramirez, Victor; Sanchez-Yanez, Raul E.; Garcia-Capulin, Carlos H.; Montecillo-Puente, Francisco J.

    2007-01-01

    Several conclusions arise from our experience applying soft computing (specifically fuzzy logic and genetic algorithms) to develop robotic vision applications. Fuzzy logic is well suited for problems where uncertainty representation is a critical issue. We already applied fuzzy logic to cope with illumination changes when tracking objects in a visual sequence. Another domain for application of fuzzy logic in robotic vision is to use it where only qualitative experience is available to perform...

  18. Using Computer Vision System for Detecting Tiredness

    OpenAIRE

    Martínez Bolaños, Francisco

    2015-01-01

    The purpose of the thesis is to demonstrate an application of computer vision systems which are useful nowadays, especially in face recognition. Computer vision systems is a big field with multiple applications. We can compare image processing from its beginning when a camera looks at an image and end with the final processed image with human beings looking at an object and later in both human and machines, using that image, processed in the machines, for recognition of reality. The rea...

  19. Neural timing and patterns of color vision

    OpenAIRE

    Lee, Hannah

    2011-01-01

    Visual perception helps us navigate through the world full of sensory information. The method by which the neural system organizes and modulates information has been studied but still remains elusive. To investigate how our brain encodes sensory information, we targeted color since it is one of the rudimentary features of vision. Using event-related potential (ERP), we tested healthy participants with normal color vision and instructed them with tasks of viewing isoluminant colored squares wh...

  20. Computer Vision Method in Human Motion Detection

    Institute of Scientific and Technical Information of China (English)

    FU Li; FANG Shuai; XU Xin-he

    2007-01-01

    Human motion detection based on computer vision is a frontier research topic and is causing an increasing attention in the field of computer vision research. The wavelet transform is used to sharpen the ambiguous edges in human motion image. The shadow's effect to the image processing is also removed. The edge extraction can be successfully realized.This is an effective method for the research of human motion analysis system.

  1. Vision-based toddler tracking at home

    OpenAIRE

    Na, H; Qin, SF; Wright, D.

    2007-01-01

    This paper presents a vision-based toddler tracking system for detecting risk factors of a toddler's fall within the home environment. The risk factors have environmental and behavioral aspects and the research in this paper focuses on the behavioral aspects. Apart from common image processing tasks such as background subtraction, the vision-based toddler tracking involves human classification, acquisition of motion and position information, and handling of regional merges and splits. The hum...

  2. Presentation of Database on Aims and Visions

    DEFF Research Database (Denmark)

    Lundgaard, Jacob

    2005-01-01

    This presentation presents a database on aims and visions regarding regional development and transport and infrastructure in the corridor from Oslo-Göteborg-Copenhagen-Berlin. The process, the developed methodology as well as the result of the database is presented.......This presentation presents a database on aims and visions regarding regional development and transport and infrastructure in the corridor from Oslo-Göteborg-Copenhagen-Berlin. The process, the developed methodology as well as the result of the database is presented....

  3. Analog "neuronal" networks in early vision

    OpenAIRE

    Koch, C; Marroquin, J; Yuille, A.

    1986-01-01

    Many problems in early vision can be formulated in terms of minimizing a cost function. Examples are shape from shading, edge detection, motion analysis, structure from motion, and surface interpolation. As shown by Poggio and Koch [Poggio, T. & Koch, C. (1985) Proc. R. Soc. London, Ser. B 226, 303-323], quadratic variational problems, an important subset of early vision tasks, can be "solved" by linear, analog electrical, or chemical networks. However, in the presence of discontinuities, the...

  4. Development of Parallel Algorithms for Computer Vision

    Directory of Open Access Journals (Sweden)

    Jharna Majumdar

    1996-10-01

    Full Text Available Computer vision is an important research area where computationally-intensive and time critical problems need to be solved routinely. This paper described some parallel algorithms for image processing and computational geometry applicable to the field of 'robot vision' which was developed using PACE parallel computer, a closely coupled message passing MIMD machine, designed and developed at the Advanced Numerical Reserach & Analysis Group, Hyderabad.

  5. A REVIEW ON OBSTACLE DETECTION AND VISION

    OpenAIRE

    Pooja Sharma; Shimi S. L; , Dr. S.Chatterji

    2015-01-01

    Vision is a beautiful gift to human beings by GOD. Vision allows people to perceive and understand the surrounding world. Till date blind people struggle a lot to live their miserable life. Their problems have made them to lose their hope to live in this competing society. Global estimate of the number of visually impaired people according to World Health Organization survey made in 2010 is 285 million people are visually impaired worldwide. Numerous technical aids that have been ...

  6. Ultraviolet vision may be widespread in bats

    Science.gov (United States)

    Gorresen, P. Marcos; Cryan, Paul; Dalton, David C.; Wolf, Sandy; Bonaccorso, Frank

    2015-01-01

    Insectivorous bats are well known for their abilities to find and pursue flying insect prey at close range using echolocation, but they also rely heavily on vision. For example, at night bats use vision to orient across landscapes, avoid large obstacles, and locate roosts. Although lacking sharp visual acuity, the eyes of bats evolved to function at very low levels of illumination. Recent evidence based on genetics, immunohistochemistry, and laboratory behavioral trials indicated that many bats can see ultraviolet light (UV), at least at illumination levels similar to or brighter than those before twilight. Despite this growing evidence for potentially widespread UV vision in bats, the prevalence of UV vision among bats remains unknown and has not been studied outside of the laboratory. We used a Y-maze to test whether wild-caught bats could see reflected UV light and whether such UV vision functions at the dim lighting conditions typically experienced by night-flying bats. Seven insectivorous species of bats, representing five genera and three families, showed a statistically significant ‘escape-toward-the-light’ behavior when placed in the Y-maze. Our results provide compelling evidence of widespread dim-light UV vision in bats.

  7. Compact Autonomous Hemispheric Vision System

    Science.gov (United States)

    Pingree, Paula J.; Cunningham, Thomas J.; Werne, Thomas A.; Eastwood, Michael L.; Walch, Marc J.; Staehle, Robert L.

    2012-01-01

    Solar System Exploration camera implementations to date have involved either single cameras with wide field-of-view (FOV) and consequently coarser spatial resolution, cameras on a movable mast, or single cameras necessitating rotation of the host vehicle to afford visibility outside a relatively narrow FOV. These cameras require detailed commanding from the ground or separate onboard computers to operate properly, and are incapable of making decisions based on image content that control pointing and downlink strategy. For color, a filter wheel having selectable positions was often added, which added moving parts, size, mass, power, and reduced reliability. A system was developed based on a general-purpose miniature visible-light camera using advanced CMOS (complementary metal oxide semiconductor) imager technology. The baseline camera has a 92 FOV and six cameras are arranged in an angled-up carousel fashion, with FOV overlaps such that the system has a 360 FOV (azimuth). A seventh camera, also with a FOV of 92 , is installed normal to the plane of the other 6 cameras giving the system a > 90 FOV in elevation and completing the hemispheric vision system. A central unit houses the common electronics box (CEB) controlling the system (power conversion, data processing, memory, and control software). Stereo is achieved by adding a second system on a baseline, and color is achieved by stacking two more systems (for a total of three, each system equipped with its own filter.) Two connectors on the bottom of the CEB provide a connection to a carrier (rover, spacecraft, balloon, etc.) for telemetry, commands, and power. This system has no moving parts. The system's onboard software (SW) supports autonomous operations such as pattern recognition and tracking.

  8. Generic motion platform for active vision

    Science.gov (United States)

    Weiman, Carl F. R.; Vincze, Markus

    1996-10-01

    The term 'active vision' was first used by Bajcsy at a NATO workshop in 1982 to describe an emerging field of robot vision which departed sharply from traditional paradigms of image understanding and machine vision. The new approach embeds a moving camera platform as an in-the-loop component of robotic navigation or hand-eye coordination. Visually served steering of the focus of attention supercedes the traditional functions of recognition and gaging. Custom active vision platforms soon proliferated in research laboratories in Europe and North America. In 1990 the National Science Foundation funded the design of a common platform to promote cooperation and reduce cost in active vision research. This paper describes the resulting platform. The design was driven by payload requirements for binocular motorized C-mount lenses on a platform whose performance and articulation emulate those of the human eye- head system. The result was a 4-DOF mechanisms driven by servo controlled DC brush motors. A crossbeam supports two independent worm-gear driven camera vergence mounts at speeds up to 1,000 degrees per second over a range of +/- 90 degrees from dead ahead. This crossbeam is supported by a pan-tilt mount whose horizontal axis intersects the vergence axes for translation-free camera rotation about these axes at speeds up to 500 degrees per second.

  9. VISION- REQUIREMENT FOR A SUCCESSFUL LEADER

    Directory of Open Access Journals (Sweden)

    Angela - Olimpia Lobonea (Oltean

    2014-12-01

    Full Text Available These people were called in the past chiefs, rulers. Now they are known as leaders. After management by objectives, strategic planning, project organization, this concept appears as a tool called "fourth generation". It is called VISION. Leadership and vision exist in the actual sense, which has become modern a few decades ago, managing to gather during this time a variety of scientific instruments. The connection between these two domains creates a certain type of leader, the visionary leader. The hypothesis from which we start is that all active leaders have a vision of what needs to be accomplished, and the inability to predict something that could be provided involves loss the capacity of the leader. Without vision, the energy reaches the lowest quotas, production decreases, terms limits are exceeded and human resources begin to dissipate.. The conclusion is that visionary leaders are endowed with multiple attributes (multiple intelligence, even if sometimes the role of intuition and unconscious in building vision at the expense of reason that is based on experience and facts is exaggerated.

  10. Correction for near vision in pseudophakic patients

    Directory of Open Access Journals (Sweden)

    Dujić Mirjana

    2004-01-01

    Full Text Available Objective of the study was to show the mean values of correction for near vision and to discuss the presbyopic correction in pseudophakic patients. Setting was the Eye department where authors work. Inclusion criteria for 55 patients were native or corrected distant vision of 0.8-1.0 on Snellen's chart; 0,6 on Jagger's chart for near vision; round pupil and good position of the implant. Biometry of the anterior chamber depth with Alcon biophysics during distant and near vision was performed in our study. „Hi square" test was carried out and it was concluded that patients younger than 59 years (41 eyes had median correction of +2.0 dsph, while patients older than 60 years (36 eyes had correction of+3.0 dsph, but it was not statistically significant. There was no statistically significant difference of the correction between pseudophakic (41 and phakic (19 eyes in patients younger than 59 years. The anterior movement of the IOL was 0.18 mm in the younger group and 0.15 mm in the older group. With good IOL movement and new materials which could have changeable refractive power, the problem of pseudophakic correction for near vision might be solved.

  11. Analog "neuronal" networks in early vision.

    Science.gov (United States)

    Koch, C; Marroquin, J; Yuille, A

    1986-01-01

    Many problems in early vision can be formulated in terms of minimizing a cost function. Examples are shape from shading, edge detection, motion analysis, structure from motion, and surface interpolation. As shown by Poggio and Koch [Poggio, T. & Koch, C. (1985) Proc. R. Soc. London, Ser. B 226, 303-323], quadratic variational problems, an important subset of early vision tasks, can be "solved" by linear, analog electrical, or chemical networks. However, in the presence of discontinuities, the cost function is nonquadratic, raising the question of designing efficient algorithms for computing the optimal solution. Recently, Hopfield and Tank [Hopfield, J. J. & Tank, D. W. (1985) Biol. Cybern. 52, 141-152] have shown that networks of nonlinear analog "neurons" can be effective in computing the solution of optimization problems. We show how these networks can be generalized to solve the nonconvex energy functionals of early vision. We illustrate this approach by implementing a specific analog network, solving the problem of reconstructing a smooth surface from sparse data while preserving its discontinuities. These results suggest a novel computational strategy for solving early vision problems in both biological and real-time artificial vision systems. PMID:3459172

  12. Analog ``Neuronal'' Networks in Early Vision

    Science.gov (United States)

    Koch, Christof; Marroquin, Jose; Yuille, Alan

    1986-06-01

    Many problems in early vision can be formulated in terms of minimizing a cost function. Examples are shape from shading, edge detection, motion analysis, structure from motion, and surface interpolation. As shown by Poggio and Koch [Poggio, T. & Koch, C. (1985) Proc. R. Soc. London, Ser. B 226, 303-323], quadratic variational problems, an important subset of early vision tasks, can be ``solved'' by linear, analog electrical, or chemical networks. However, in the presence of discontinuities, the cost function is nonquadratic, raising the question of designing efficient algorithms for computing the optimal solution. Recently, Hopfield and Tank [Hopfield, J. J. & Tank, D. W. (1985) Biol. Cybern. 52, 141-152] have shown that networks of nonlinear analog ``neurons'' can be effective in computing the solution of optimization problems. We show how these networks can be generalized to solve the nonconvex energy functionals of early vision. We illustrate this approach by implementing a specific analog network, solving the problem of reconstructing a smooth surface from sparse data while preserving its discontinuities. These results suggest a novel computational strategy for solving early vision problems in both biological and real-time artificial vision systems.

  13. True Visions The Emergence of Ambient Intelligence

    CERN Document Server

    Aarts, Emile

    2006-01-01

    Ambient intelligence (AI) refers to a developing technology that will increasingly make our everyday environment sensitive and responsive to our presence. The AI vision requires technology invisibly embedded in our everyday surroundings, present whenever we need it that will lead to the seamless integration of lighting, sounds, vision, domestic appliances, and personal healthcare products to enhance our living experience. Written for the non-specialist seeking an authoritative but accessible overview of this interdisciplinary field, True Visions explains how the devices making up the AI world will operate collectively using information and intelligence hidden in the wireless network connecting them. Expert contributions address key AI components such as smart materials and textiles, system architecture, mobile computing, broadband communication, and underlying issues of human-environment interactions. It seeks to unify the perspectives of scientists from diverse backgrounds ranging from the physics of materia...

  14. A compact PE memory for vision chips

    International Nuclear Information System (INIS)

    This paper presents a novel compact memory in the processing element (PE) for single-instruction multiple-data (SIMD) vision chips. The PE memory is constructed with 8 × 8 register cells, where one latch in the slave stage is shared by eight latches in the master stage. The memory supports simultaneous read and write on the same address in one clock cycle. Its compact area of 14.33 μm2/bit promises a higher integration level of the processor. A prototype chip with a 64 × 64 PE array is fabricated in a UMC 0.18 μm CMOS technology. Five types of the PE memory cell structure are designed and compared. The testing results demonstrate that the proposed PE memory architecture well satisfies the requirement of the vision chip in high-speed real-time vision applications, such as 1000 fps edge extraction. (semiconductor integrated circuits)

  15. Near real-time stereo vision system

    Science.gov (United States)

    Anderson, Charles H. (Inventor); Matthies, Larry H. (Inventor)

    1993-01-01

    The apparatus for a near real-time stereo vision system for use with a robotic vehicle is described. The system is comprised of two cameras mounted on three-axis rotation platforms, image-processing boards, a CPU, and specialized stereo vision algorithms. Bandpass-filtered image pyramids are computed, stereo matching is performed by least-squares correlation, and confidence ranges are estimated by means of Bayes' theorem. In particular, Laplacian image pyramids are built and disparity maps are produced from the 60 x 64 level of the pyramids at rates of up to 2 seconds per image pair. The first autonomous cross-country robotic traverses (of up to 100 meters) have been achieved using the stereo vision system of the present invention with all computing done onboard the vehicle. The overall approach disclosed herein provides a unifying paradigm for practical domain-independent stereo ranging.

  16. VISION: Verifiable Fuel Cycle Simulation Model

    International Nuclear Information System (INIS)

    The nuclear fuel cycle consists of a set of complex components that work together in unison. In order to support the nuclear renaissance, it is necessary to understand the impacts of changes and timing of events in any part of the fuel cycle system. The Advanced Fuel Cycle Initiative's systems analysis group is developing a dynamic simulation model, VISION, to capture the relationships, timing, and changes in and among the fuel cycle components to help develop an understanding of how the overall fuel cycle works. This paper is an overview of the philosophy and development strategy behind VISION. The paper includes some descriptions of the model components and some examples of how to use VISION.

  17. VISION: Verifiable Fuel Cycle Simulation Model

    Energy Technology Data Exchange (ETDEWEB)

    Jacob Jacobson; A. M. Yacout; Gretchen Matthern; Steven Piet; David Shropshire; Tyler Schweitzer

    2010-11-01

    The nuclear fuel cycle consists of a set of complex components that work together in unison. In order to support the nuclear renaissance, it is necessary to understand the impacts of changes and timing of events in any part of the fuel cycle system. The Advanced Fuel Cycle Initiative’s systems analysis group is developing a dynamic simulation model, VISION, to capture the relationships, timing, and changes in and among the fuel cycle components to help develop an understanding of how the overall fuel cycle works. This paper is an overview of the philosophy and development strategy behind VISION. The paper includes some descriptions of the model components and some examples of how to use VISION.

  18. VISION: Verifiable Fuel Cycle Simulation Model

    Energy Technology Data Exchange (ETDEWEB)

    Jacob J. Jacobson; Abdellatif M. Yacout; Gretchen E. Matthern; Steven J. Piet; David E. Shropshire

    2009-04-01

    The nuclear fuel cycle is a very complex system that includes considerable dynamic complexity as well as detail complexity. In the nuclear power realm, there are experts and considerable research and development in nuclear fuel development, separations technology, reactor physics and waste management. What is lacking is an overall understanding of the entire nuclear fuel cycle and how the deployment of new fuel cycle technologies affects the overall performance of the fuel cycle. The Advanced Fuel Cycle Initiative’s systems analysis group is developing a dynamic simulation model, VISION, to capture the relationships, timing and delays in and among the fuel cycle components to help develop an understanding of how the overall fuel cycle works and can transition as technologies are changed. This paper is an overview of the philosophy and development strategy behind VISION. The paper includes some descriptions of the model and some examples of how to use VISION.

  19. Computation and parallel implementation for early vision

    Science.gov (United States)

    Gualtieri, J. Anthony

    1990-01-01

    The problem of early vision is to transform one or more retinal illuminance images-pixel arrays-to image representations built out of such primitive visual features such as edges, regions, disparities, and clusters. These transformed representations form the input to later vision stages that perform higher level vision tasks including matching and recognition. Researchers developed algorithms for: (1) edge finding in the scale space formulation; (2) correlation methods for computing matches between pairs of images; and (3) clustering of data by neural networks. These algorithms are formulated for parallel implementation of SIMD machines, such as the Massively Parallel Processor, a 128 x 128 array processor with 1024 bits of local memory per processor. For some cases, researchers can show speedups of three orders of magnitude over serial implementations.

  20. Spectral Test Instrument for Color Vision Measurement

    Institute of Scientific and Technical Information of China (English)

    Balázs Vince Nagy; Gy(o)rgy (A)brahám

    2005-01-01

    Common displays such as CRT or LCD screens have limited capabilities in displaying most color spectra correctly. The main disadvantage of these devices is that they work with three primaries and the colors displayed are the mixture of these three colours. Consequently these devices can be confusing in testing human color identification, because the spectral distribution of the colors displayed is the combined spectrum of the three primaries. We have developed a new instrument for spectrally correct color vision measurement. This instrument uses light emitting diodes (LEDs) and is capable of producing all spectra of perceivable colors, thus with appropriate test methods this instrument can be a reliable and useful tool in testing human color vision and in verifying color vision correction.

  1. Coevolution of active vision and feature selection.

    Science.gov (United States)

    Floreano, Dario; Kato, Toshifumi; Marocco, Davide; Sauser, Eric

    2004-03-01

    We show that complex visual tasks, such as position- and size-invariant shape recognition and navigation in the environment, can be tackled with simple architectures generated by a coevolutionary process of active vision and feature selection. Behavioral machines equipped with primitive vision systems and direct pathways between visual and motor neurons are evolved while they freely interact with their environments. We describe the application of this methodology in three sets of experiments, namely, shape discrimination, car driving, and robot navigation. We show that these systems develop sensitivity to a number of oriented, retinotopic, visual-feature-oriented edges, corners, height, and a behavioral repertoire to locate, bring, and keep these features in sensitive regions of the vision system, resembling strategies observed in simple insects. PMID:15052484

  2. Robot vision system for remote plutonium disposition

    International Nuclear Information System (INIS)

    Tons of weapons-usable plutonium has been declared surplus to the national security needs of the United States. The Plutonium Immobilization Program (PIP) is a US Department of Energy sponsored program to place excess plutonium in a stable form and make it unattractive for reuse. A vision system was developed as part of PIP robotic and remote systems development. This vision system provides visual feedback to a can-loading robot that places plutonium/ceramic pucks in stainless steel cans. Inexpensive grayscale CCD cameras were used in conjunction with an off-the-shelf video capture card and computer to build an effective two-camera vision system. Testing demonstrates the viability of this technology for use in the Plutonium Immobilization Project facility, which is scheduled to begin operations in 2008

  3. Three-Dimensional Robotic Vision System

    Science.gov (United States)

    Nguyen, Thinh V.

    1989-01-01

    Stereoscopy and motion provide clues to outlines of objects. Digital image-processing system acts as "intelligent" automatic machine-vision system by processing views from stereoscopic television cameras into three-dimensional coordinates of moving object in view. Epipolar-line technique used to find corresponding points in stereoscopic views. Robotic vision system analyzes views from two television cameras to detect rigid three-dimensional objects and reconstruct numerically in terms of coordinates of corner points. Stereoscopy and effects of motion on two images complement each other in providing image-analyzing subsystem with clues to natures and locations of principal features.

  4. "Craziness" and "visions": experiences after a stroke.

    OpenAIRE

    Wender, D

    1987-01-01

    For a stroke victim there may be at least three types of strange occurrences: incorrect saying, seeing, and thinking. To the patient only the third seems to be "crazy". After a stroke (left hemisphere), which mainly produced serious aphasia, I (the patient) felt crazy two or three times when someone said something I expected him to say. On the other hand, my initial aphasic "gibberish speech" and an occasional false vision did not seem crazy. In my case the vision is always a car or a child, ...

  5. Empirical evaluation methods in computer vision

    CERN Document Server

    Christensen, Henrik I

    2002-01-01

    This book provides comprehensive coverage of methods for the empirical evaluation of computer vision techniques. The practical use of computer vision requires empirical evaluation to ensure that the overall system has a guaranteed performance. The book contains articles that cover the design of experiments for evaluation, range image segmentation, the evaluation of face recognition and diffusion methods, image matching using correlation methods, and the performance of medical image processing algorithms. Sample Chapter(s). Foreword (228 KB). Chapter 1: Introduction (505 KB). Contents: Automate

  6. Hidden Markov models applications in computer vision

    CERN Document Server

    Bunke, H

    2001-01-01

    Hidden Markov models (HMMs) originally emerged in the domain of speech recognition. In recent years, they have attracted growing interest in the area of computer vision as well. This book is a collection of articles on new developments in the theory of HMMs and their application in computer vision. It addresses topics such as handwriting recognition, shape recognition, face and gesture recognition, tracking, and image database retrieval.This book is also published as a special issue of the International Journal of Pattern Recognition and Artificial Intelligence (February 2001).

  7. Active sensor planning for multiview vision tasks

    CERN Document Server

    Chen, Shengyong; Zhang, Jianwei; Wang, Wanliang

    2008-01-01

    An active robot system can change its visual parameters in an intentional manner and perform its sensing actions purposefully. A general vision task thus can be performed in an efficient way by means of strategic control of the perception process. The controllable processes include 3D active sensing, sensor configuration and recalibration, automatic sensor placement, and 3D sensing. This book explores these important issues in studying for active visual perception.Vision sensors have limited fields of views and can only ""see"" a portion of a scene from a single viewpoint. To make the entire o

  8. Colour vision screening among Saudi Arabian children

    OpenAIRE

    O. Matthew Oriowo; Abdullah Z. Alotaibi

    2008-01-01

    Purpose: To determine the prevalence of congenital red-green colour vision defects among Saudi Arabian male and female children.Methods: The study involved 1638 elementary and high school participants (838 males, and 800 females), who were randomly selected and screened for red-green colour vision defects using the Ishihara (pseudo-isochromatic plates) test. Inclusion criteria were Snellen VA 20/20 or better and absence of known ocular pathologies.Among the females, 0.75% of the 800 participa...

  9. Electronic books as low vision aids

    OpenAIRE

    Crossland, Michael; Macedo, António Filipe; Rubin, G S

    2010-01-01

    Every year, around 34 000 people in England and Wales are newly registered as sight impaired or severely sight impaired, the majority of whom have some residual vision.1 In order to read books, people with low vision will generally rely on large print books and supplementary optical2 or electronic3 magnifiers. Only about 1.5% of the approximately two million books currently in print are available in large print format.4 Recently, several electronic book readers have become commercially av...

  10. Vision as Biblical intertext in St. Gertrud

    Directory of Open Access Journals (Sweden)

    Ana Laura Forastieri, ocso

    2015-04-01

    Full Text Available I begin proposing that the visionary experience is a place of recreation and up to date reading of biblical experience; in the case of St. Gertrud this experience takes place principally in a liturgical context. I propose thus a three step hermeneutic path: from the biblical to the liturgical text; from this one to vision; from vision to the creation of the text that communicates it. Then I analyze a visionary text from St’ Gertrud’s writings, showing how it is structured in basis to biblical texts, interpreted through the traditional hermeneutic of the four senses of Scripture.

  11. Research in computer and robot vision

    CERN Document Server

    Archibald, Colin

    1995-01-01

    Research in Computer and Robot Vision is directed toward researchers and graduate students in the field of computer vision. A broad spectrum of recent research is presented including sensing and navigation for mobile robots, the extraction of lines, curves, surfaces, and skeletons from intensity images and range images, human motion, and feature extraction. Three applied research projects are presented on the topics of handwriting recognition, automatic understanding of technical drawings, and the collection and interpretation of 3-D images for use in dentistry. These papers dramatically illus

  12. Effects of high power illuminators on vision through windscreens and driving behavior

    NARCIS (Netherlands)

    Toet, A.; Alferdinck, J.W.A.M.

    2013-01-01

    In this study we investigated the effectiveness of high power illuminators that are intended to be used as warning devices or non-lethal weapons to deny car drivers their view on the outside world through windscreens. The test is based on a measurement of the amount of veiling glare resulting when a

  13. Even Mild Football Head Hits Can Harm Vision

    Science.gov (United States)

    ... or federal policy. More Health News on: Concussion Sports Injuries Vision Impairment and Blindness Recent Health News Related MedlinePlus Health Topics Concussion Sports Injuries Vision Impairment and Blindness About MedlinePlus Site Map ...

  14. 78 FR 47818 - Qualification of Drivers; Exemption Applications; Vision

    Science.gov (United States)

    2013-08-06

    ... FR 3316). FOR FURTHER INFORMATION CONTACT: Elaine M. Papp, Chief, Medical Programs Division, (202... Federal Motor Carrier Safety Administration Qualification of Drivers; Exemption Applications; Vision... exemption from the vision requirement in the Federal Motor Carrier Safety Regulations. They are unable...

  15. Low Vision Devices for the Home

    Medline Plus

    Full Text Available ... right? MRS. BROOKS: I hope I don't go over the top! INSTRUCTOR: Let's see what happens. I don't think that' ... with low vision, like yourself, so you can go ahead and fill that check out. MRS. BROOKS: Well, let's see--I believe today is the sixth. And ...

  16. A smartphone-based vision simulator

    OpenAIRE

    Praveena, Pragathi; Kavalam, Jobin J; Jacob, Namita

    2016-01-01

    Simulators, as tools that can clearly bring out the effect of impairment, are invaluable in the design and development process of an assistive device. Simulators are vital in meeting high standards of accessibility. Described is our work on a smartphone-based vision simulator for diabetic retinopathy that is economic, portable, flexible and easy-to-use.

  17. Ultra-Rapid Vision in Birds.

    Directory of Open Access Journals (Sweden)

    Jannika E Boström

    Full Text Available Flying animals need to accurately detect, identify and track fast-moving objects and these behavioral requirements are likely to strongly select for abilities to resolve visual detail in time. However, evidence of highly elevated temporal acuity relative to non-flying animals has so far been confined to insects while it has been missing in birds. With behavioral experiments on three wild passerine species, blue tits, collared and pied flycatchers, we demonstrate temporal acuities of vision far exceeding predictions based on the sizes and metabolic rates of these birds. This implies a history of strong natural selection on temporal resolution. These birds can resolve alternating light-dark cycles at up to 145 Hz (average: 129, 127 and 137, respectively, which is ca. 50 Hz over the highest frequency shown in any other vertebrate. We argue that rapid vision should confer a selective advantage in many bird species that are ecologically similar to the three species examined in our study. Thus, rapid vision may be a more typical avian trait than the famously sharp vision found in birds of prey.

  18. Photochemistry: A coherent picture of vision

    Science.gov (United States)

    Mathies, Richard A.

    2015-12-01

    Vision is initiated by photoisomerization of 11-cis retinal in the visual pigment rhodopsin -- a fast and efficient process. Spectroscopic studies now demonstrate that the transition from the reactant photoexcited-state to the ground-state photoproduct, which mediates this important reaction, occurs on a sub-50-fs timescale and is vibrationally coherent.

  19. Prevent Vision Loss with Early Diagnosis

    Medline Plus

    Full Text Available ... vision seemed a little blurry and I decided to get it checked. I thought I just needed new glasses so I never expected what the doctor found. Doctor: I know that Mary has diabetes, so I was looking for diabetic eye ...

  20. 2020 Vision Project Summary: FY99

    Energy Technology Data Exchange (ETDEWEB)

    K.W. Gordon; K.P. Scott

    2000-01-01

    During the 1998-99 school year, students from participating schools completed and submitted a variety of scenarios describing potential world and regional conditions in the year 2020 and their possible effect on U.S. national security. This report summarizes the student's views and describes trends observed over the course of the 2020 Vision project's four years.

  1. Features of the Manufacturing Vision Development Process

    DEFF Research Database (Denmark)

    Dukovska-Popovska, Iskra; Riis, Jens Ove; Boer, Harry

    2005-01-01

    This paper discusses the key features of the process of Manufacturing Vision Development, a process that enables companies to develop their future manufacturing concept. The basis for the process is a generic five-phase methodology (Riis and Johansen, 2003) developed as a result of ten years of a...

  2. Clearing Up Blurry Vision: Causes of Myopia

    Institute of Scientific and Technical Information of China (English)

    Carrie Lock; 秦艳艳

    2004-01-01

    @@ Next time you can't make out a distant highway sign, blame your parents.Scientists in the United Kingdom have found that myopia, or nearsightedness, is predominantly hereditary②, and they' re beginning to unravel③ the genetic④mechanism that causes the vision problem.

  3. Computer vision for a robot sculptor

    Science.gov (United States)

    Brand, Matthew

    1997-06-01

    Before make computers can be active collaborators in design work, they must be equipped with some human-like visual and design skills. Towards this end, we report some advances in integrating computer vision and automated design in a computational model of 'artistic vision' -- the ability to see something striking in a subject and express it in a creative design. The artificial artist studies images of animals, then designs sculpture that conveys something of the strength, tension, and expression in the animals' bodies. It performs an anatomical analysis using conventional computer vision techniques constrained by high-level causal inference to find significant areas of the body, e.g., joints under stress. The sculptural form -- kinetic mobiles -- presents a number of mechanical and aesthetic design challenges, which the system solves in imagery using field-based computing methods. Coupled potential fields simultaneously enforce soft and hard constraints -- e.g., the mobile should resemble the original animal and every subassembly of the mobile must be precisely balanced. The system uses iconic representations in all stages, obviating the need to translate between spatial and predicate representations and allowing a rich flow of information between vision and design.

  4. Computer vision for autonomous robotics in space

    Science.gov (United States)

    Wong, Andrew K. C.

    1993-08-01

    This paper presents a computer vision system being developed at the Pattern Analysis and Machine Intelligence (PAMI) Lab of the University of Waterloo and at the Vision, Intelligence and Robotics Technologies Corporation (VIRTEK) in support of the Canadian Space Autonomous Robotics Project. This system was originally developed for flexible manufacturing and guidance of autonomous roving vehicles. In the last few years, it has been engineered to support the operations of the Mobile Service System (MSS) (or its equivalence) for the Space Station Project. In the near term, this vision system will provide vision capability for the recognition, location and tracking of payloads as well as for relating the spatial information to the manipulator for capturing, manipulating and berthing payloads. In the long term, it will serve in the role of inspection, surveillance and servicing of the Station. Its technologies will be continually expanded and upgraded to meet the demand as the needs of the Space Station evolve and grow. Its spin-off technologies will benefit the industrial sectors as well.

  5. Optical stimulator for vision-based sensors

    DEFF Research Database (Denmark)

    Rössler, Dirk; Pedersen, David Arge Klevang; Benn, Mathias;

    2014-01-01

    We have developed an optical stimulator system for vision-based sensors. The stimulator is an efficient tool for stimulating a camera during on-ground testing with scenes representative of spacecraft flights. Such scenes include starry sky, planetary objects, and other spacecraft. The optical...

  6. Cool Wool Iaunched at Premiere Vision

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    Visitors to Premiere Vision were greeted by the inspired The Woolmark Company image, rapidly becoming iconic, of a welcoming flock of stylish Merino sheep in sunglasses. It raised many a smile and set the scene for a feel- good exhibition, putting Cool Wool firmly at the doorway to the new summer season 2013.

  7. Theories and Algorithms of Computational Vision

    Institute of Scientific and Technical Information of China (English)

    Ma Songde; Tan Tieniu; Hu Zhanyi; Jiang Tianzi; Lu Hanqing

    2005-01-01

    @@ Inspired by the recent progresses in the related fields such as cognitive psychology, neural physiology and neural anatomy, the project aims to put forward new computational theories and algorithms which could overcome the main shortcomings in the Marr's computational theory, a dominant paradigm for the last 20 years in computer vision field.

  8. A Java Framework for Computer Vision

    OpenAIRE

    Sheridan, Stephen

    2015-01-01

    This paper outlines a framework implemented entirely in Java that attempts to give students exposure to computer vision systems from a practical standpoint. Various tools and technologies are introduced that will allow a student to acquire an input image through a WebCam, extract useful information from that input image and finally, attempt to make sense of the input.

  9. Psychological Adjustment in Adolescents with Vision Impairment

    Science.gov (United States)

    Pinquart, Martin; Pfeiffer, Jens P.

    2012-01-01

    The present study compared psychological adjustment of 158 adolescents with vision impairment and 158 sighted adolescents with a matched-pair design using the Strengths and Difficulties Questionnaire. Adolescent self-reports and teacher reports on emotional problems, peer problems, and total difficulties showed higher scores in students with…

  10. Medical informatics and telemedicine: A vision

    Science.gov (United States)

    Clemmer, Terry P.

    1991-01-01

    The goal of medical informatics is to improve care. This requires the commitment and harmonious collaboration between the computer scientists and clinicians and an integrated database. The vision described is how medical information systems are going to impact the way medical care is delivered in the future.

  11. A zone theory of colour vision

    NARCIS (Netherlands)

    Walraven, P.L.

    1966-01-01

    Arguments are put forward to explain the basic facts about color vision in the frame work of a zone theory, a combination of the Young-Helmholtz and the Hering theory. Data on wavelength discrimination in particular as a function of luminance, necessitate to assume separate mechanisms for red-green

  12. Basic mechanisms of defective colour vision

    NARCIS (Netherlands)

    Walraven, P.L.

    1976-01-01

    Normal colour vision is presently described in the framework of one or other trichromatic opponent model. The trichromacy finds its origin in three different pigments, these pigments having maximal absorption in different parts of the spectrum. The absorption spectra determine the spectral sensitivi

  13. Vision and Education: Arguments, Counterarguments, Rejoinders

    Science.gov (United States)

    Pekarsky, Daniel

    2007-01-01

    This article explains the nature of vision-guided educational practice, makes the case for it, and appraises objections to this approach to education. The discussion is grounded in a critique of the rhetoric and practice associated with American education, a critique that emphasizes the continuing failure to think about educational challenges and…

  14. Preventing Vision Loss in Diabetes - Summary

    Centers for Disease Control (CDC) Podcasts

    2008-04-24

    This podcast is for a professional audience and briefly discusses how to prevent vision loss in people with diabetes.  Created: 4/24/2008 by National Center for Chronic Disease Prevention and Health Promotion (NCCDPHP), Division of Diabetes Translation (DDT), National Diabetes Education Program (NDEP).   Date Released: 6/4/2008.

  15. Neurological Vision Rehabilitation: Description and Case Study

    Science.gov (United States)

    Kingston, John; Katsaros, Jennifer; Vu, Yurika; Goodrich, Gregory L.

    2010-01-01

    The wars in Afghanistan and Iraq have been notable for the high rates of traumatic brain injury (TBI) that have been incurred by the troops. Visual impairments often occur following TBI and present new challenges for rehabilitation. We describe a neurological vision rehabilitation therapy that addresses the unique needs of patients with vision…

  16. The Unique American Vision of Childhood

    Science.gov (United States)

    Ozturk, Mehmet Ali; Debelak, Charles

    2008-01-01

    The present article scrutinizes "the unique American vision of childhood" (UAVC) as a phenomenon undermining high academic expectations and good work ethics, and in turn, contributing to the generally low academic achievement of U.S. students compared to their counterparts in other advanced countries. It starts with a definition of UAVC, followed…

  17. Primary School Children's Vision Screening Project, Mozambique

    OpenAIRE

    Phelan, Aoife

    2012-01-01

    Students on the BSc in Optometry who volunteer with the Mozambique Eyecare Project do vision screenings with local children, supervised by DIT lecturers. These screenings are accredited as part of the students’ learning, and benefit both the children and the students.

  18. Primary School Children's Vision Screening Project

    OpenAIRE

    O'Dwyer, Veronica; Harrington, Sandra

    2012-01-01

    In the final year of the BSc in Optometry, students work with children in local schools to do vision screenings, supervised by DIT lecturers. This project enhances students’ experience of working with children, and ensures that any local children with eye problems are swiftly referred to a specialist.

  19. Low Vision Devices for the Home

    Medline Plus

    Full Text Available ... now, we have two sides to it. For a low vision person such as yourself, the black side against a light background would probably be better for you. ... stove is marked with high marks which makes a bump on the top-- you should be able ...

  20. Artificial vision in nuclear fuel fabrication

    International Nuclear Information System (INIS)

    The development of artificial vision techniques opens a door to the optimization of industrial processes which the nuclear industry cannot miss out on. Backing these techniques represents a revolution in security and reliability in the manufacturing of a highly technological products as in nuclear fuel. Enusa Industrias Avanzadas S. A. has successfully developed and implemented the first automatic inspection equipment for pellets by artificial vision in the European nuclear industry which is nowadays qualified and is already developing the second generation of this machine. There are many possible applications for the techniques of artificial vision in the fuel manufacturing processes. Among the practices developed by Enusa Industrias Avanzadas are, besides the pellets inspection, the rod sealing drills detection and positioning in the BWR products and the sealing drills inspection in the PWR fuel. The use of artificial vision in the arduous and precise processes of full inspection will allow the absence of human error, the increase of control in the mentioned procedures, the reduction of doses received by the personnel, a higher reliability of the whole of the operations and an improvement in manufacturing costs. (Author)

  1. Ultra-Rapid Vision in Birds.

    Science.gov (United States)

    Boström, Jannika E; Dimitrova, Marina; Canton, Cindy; Håstad, Olle; Qvarnström, Anna; Ödeen, Anders

    2016-01-01

    Flying animals need to accurately detect, identify and track fast-moving objects and these behavioral requirements are likely to strongly select for abilities to resolve visual detail in time. However, evidence of highly elevated temporal acuity relative to non-flying animals has so far been confined to insects while it has been missing in birds. With behavioral experiments on three wild passerine species, blue tits, collared and pied flycatchers, we demonstrate temporal acuities of vision far exceeding predictions based on the sizes and metabolic rates of these birds. This implies a history of strong natural selection on temporal resolution. These birds can resolve alternating light-dark cycles at up to 145 Hz (average: 129, 127 and 137, respectively), which is ca. 50 Hz over the highest frequency shown in any other vertebrate. We argue that rapid vision should confer a selective advantage in many bird species that are ecologically similar to the three species examined in our study. Thus, rapid vision may be a more typical avian trait than the famously sharp vision found in birds of prey. PMID:26990087

  2. Prevent Vision Loss with Early Diagnosis

    Science.gov (United States)

    ... her eyesight. Ninety percent of the people with diabetic retinopathy -- even those in the most advanced stages -- can still save their vision but they have to seek help. Now the most effective treatment is laser surgery. In this procedure, doctors shine ...

  3. Prevent Vision Loss with Early Diagnosis

    Medline Plus

    Full Text Available ... her eyesight. Ninety percent of the people with diabetic retinopathy -- even those in the most advanced stages -- can still save their vision but they have to seek help. Now the most effective treatment is laser surgery. In this procedure, doctors shine ...

  4. Knowledge-based vision and simple visual machines.

    OpenAIRE

    Cliff, D.; Noble, J

    1997-01-01

    The vast majority of work in machine vision emphasizes the representation of perceived objects and events: it is these internal representations that incorporate the 'knowledge' in knowledge-based vision or form the 'models' in model-based vision. In this paper, we discuss simple machine vision systems developed by artificial evolution rather than traditional engineering design techniques, and note that the task of identifying internal representations within such systems is made difficult by t...

  5. Feedback Control and Sensor Fusion of Vision and Force

    OpenAIRE

    Olsson, Tomas

    2004-01-01

    This thesis deals with feedback control using two different sensor types, force sensors and cameras. In many tasks robotics compliance is required in order to avoid damage to the workpiece. Force and vision are the most useful sensing capabilities for a robot system operating in an unknown or uncalibrated environment. An overview of vision based estimation, control and vision/force control is given. Two different control algorithms based on a hybrid force/vision structure are presented, using...

  6. Schumpeter's 'Vision' as Filter for his Evaluation of other Economists' Visions

    OpenAIRE

    Andrea Maneschi

    2000-01-01

    In his History of Economic Analysis, Schumpeter stated that although the subject of his book is a history of economic analysis, "analytic effort is of necessity preceded by a preanalytic cognitive act that supplies the raw material for the analytic effort. In this book, this preanalytic cognitive act will be called Vision" (p. 41). Scattered through it are various examples of Schumpeter's "vision", applied to either economists or areas investigated by schools of economic thought. These exampl...

  7. 3D computer vision using Point Grey Research stereo vision cameras

    Institute of Scientific and Technical Information of China (English)

    Don Murray; Vlad Tucakov; WEI Xiong

    2008-01-01

    This paper provides an introduction to stereo vision systems designed by point grey research and describes the possible application of these types of systems. The paper presents an overview of stereo vision techniques and outlines the critical aspects of putting together a system that can perform in the real world. It also provides an overview of how the cameras can be used to facilitate stereo research.

  8. 21 CFR 886.5900 - Electronic vision aid.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Electronic vision aid. 886.5900 Section 886.5900...) MEDICAL DEVICES OPHTHALMIC DEVICES Therapeutic Devices § 886.5900 Electronic vision aid. (a) Identification. An electronic vision aid is an AC-powered or battery-powered device that consists of...

  9. 16 CFR 1203.14 - Peripheral vision test.

    Science.gov (United States)

    2010-01-01

    ... 16 Commercial Practices 2 2010-01-01 2010-01-01 false Peripheral vision test. 1203.14 Section 1203... SAFETY STANDARD FOR BICYCLE HELMETS The Standard § 1203.14 Peripheral vision test. Position the helmet on... the helmet to set the comfort or fit padding. (Note: Peripheral vision clearance may be...

  10. 21 CFR 886.5910 - Image intensification vision aid.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Image intensification vision aid. 886.5910 Section... (CONTINUED) MEDICAL DEVICES OPHTHALMIC DEVICES Therapeutic Devices § 886.5910 Image intensification vision aid. (a) Identification. An image intensification vision aid is a battery-powered device intended...

  11. Vision, Leadership, and Change: The Case of Ramah Summer Camps

    Science.gov (United States)

    Reimer, Joseph

    2010-01-01

    In his retrospective essay, Seymour Fox (1997) identified "vision" as the essential element that shaped the Ramah camp system. I will take a critical look at Fox's main claims: (1) A particular model of vision was essential to the development of Camp Ramah; and (2) That model of vision should guide contemporary Jewish educators in creating Jewish…

  12. Vision Effects: A Critical Gap in Educational Leadership Research

    Science.gov (United States)

    Kantabutra, Sooksan

    2010-01-01

    Purpose: Although leaders are widely believed to employ visions, little is known about what constitutes an "effective" vision, particularly in the higher education sector. This paper seeks to proposes a research model for examining relationships between vision components and performance of higher education institutions, as measured by financial…

  13. 21 CFR 886.5915 - Optical vision aid.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Optical vision aid. 886.5915 Section 886.5915 Food... DEVICES OPHTHALMIC DEVICES Therapeutic Devices § 886.5915 Optical vision aid. (a) Identification. An optical vision aid is a device that consists of a magnifying lens with an accompanying AC-powered...

  14. Resource Letter CCV-1: Color and Color Vision.

    Science.gov (United States)

    Stuewer, Roger H., Ed.; Pease, Paul L.

    1980-01-01

    Listed are selected resource materials on color vision and the measurement and specification of the stimulus for vision, photometry, and colorimetry. The author's purpose is to equip teachers and students with an understanding of normal and abnormal color vision. References are categorized relative to content level. (Author/DS)

  15. 21 CFR 886.5540 - Low-vision magnifier.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Low-vision magnifier. 886.5540 Section 886.5540...) MEDICAL DEVICES OPHTHALMIC DEVICES Therapeutic Devices § 886.5540 Low-vision magnifier. (a) Identification. A low-vision magnifier is a device that consists of a magnifying lens intended for use by a...

  16. 21 CFR 886.5870 - Low-vision telescope.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Low-vision telescope. 886.5870 Section 886.5870...) MEDICAL DEVICES OPHTHALMIC DEVICES Therapeutic Devices § 886.5870 Low-vision telescope. (a) Identification. A low-vision telescope is a device that consists of an arrangement of lenses or mirrors intended...

  17. 21 CFR 886.1170 - Color vision tester.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Color vision tester. 886.1170 Section 886.1170...) MEDICAL DEVICES OPHTHALMIC DEVICES Diagnostic Devices § 886.1170 Color vision tester. (a) Identification. A color vision tester is a device that consists of various colored materials, such as colored...

  18. 21 CFR 886.1160 - Color vision plate illuminator.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Color vision plate illuminator. 886.1160 Section... (CONTINUED) MEDICAL DEVICES OPHTHALMIC DEVICES Diagnostic Devices § 886.1160 Color vision plate illuminator. (a) Identification. A color vision plate illuminator is an AC-powered device that is a lamp...

  19. Early Cognitive Vision as a Frontend for Cognitive Systems

    DEFF Research Database (Denmark)

    Krüger, Norbert; Pugeault, Nicolas; Baseski, Emre; Jensen, Lars Baunegaard With; Kalkan, Sinan; Kraft, Dirk; Jessen, Jeppe Barsøe; Pilz, Florian; Kjær-Nielsen, Anders; Popovic, Mila; Asfour, Tamim; Piater, Justus; Kragic, Danica; Wörgötter, Florentin

    We discuss the need of an elaborated in-between stage bridging early vision and cognitive vision which we call `Early Cognitive Vision' (ECV). This stage provides semantically rich, disambiguated and largely task independent scene representations which can be used in many contexts. In addition, the...

  20. Technological process supervising using vision systems cooperating with the LabVIEW vision builder

    Science.gov (United States)

    Hryniewicz, P.; Banaś, W.; Gwiazda, A.; Foit, K.; Sękala, A.; Kost, G.

    2015-11-01

    One of the most important tasks in the production process is to supervise its proper functioning. Lack of required supervision over the production process can lead to incorrect manufacturing of the final element, through the production line downtime and hence to financial losses. The worst result is the damage of the equipment involved in the manufacturing process. Engineers supervise the production flow correctness use the great range of sensors supporting the supervising of a manufacturing element. Vision systems are one of sensors families. In recent years, thanks to the accelerated development of electronics as well as the easier access to electronic products and attractive prices, they become the cheap and universal type of sensors. These sensors detect practically all objects, regardless of their shape or even the state of matter. The only problem is considered with transparent or mirror objects, detected from the wrong angle. Integrating the vision system with the LabVIEW Vision and the LabVIEW Vision Builder it is possible to determine not only at what position is the given element but also to set its reorientation relative to any point in an analyzed space. The paper presents an example of automated inspection. The paper presents an example of automated inspection of the manufacturing process in a production workcell using the vision supervising system. The aim of the work is to elaborate the vision system that could integrate different applications and devices used in different production systems to control the manufacturing process.

  1. Analysis of the Difference between the Normal Vision and the Experiencing Cataract Vision on Binocular Color Fusion Limit

    Directory of Open Access Journals (Sweden)

    Shi Wang

    2015-10-01

    Full Text Available The optical instruments design for binocular vision has become an earnest demand towards the arrival of an ageing society. It is necessary to measure how color difference between left and right images by elderly people, which the color rivalry occurs. In this study, we measured the limit of binocular color fusion in the normal vision and the cataract experiencing vision which is aiming to simulate the elderly vision. The result shows that the color fusion limit curve in cataract experiencing vision are very similar with those in normal vision. Compared with the binocular color fusion limit in normal vision Δλdn, the binocular color fusion limit in cataract experiencing vision Δλdc is approximately 3~39nm increased on the central vision, 4~22nm on the retinal eccentricity of 3°, 5~23nm on the retinal eccentricity of 6°, and 5~24nm on the retinal eccentricity of 9°. The results also reveal that a similar limit is observed in the range of 520~560nm in both normal and cataract experiencing visions, which might give some potential evidences for designing 3D equipment. In addition, the minimum value of the binocular color fusion limit exists at 590nm either in the normal vision or the cataract experiencing vision during all retinal eccentricities

  2. Workshop on discomfort glare: Final report

    DEFF Research Database (Denmark)

    Osterhaus, Werner; Veitch, J A

    Report on workshop presented at 27th Session of the International Commission on Illumination, Sun City, South Africa......Report on workshop presented at 27th Session of the International Commission on Illumination, Sun City, South Africa...

  3. Verifiable Fuel Cycle Simulation (VISION) Model

    International Nuclear Information System (INIS)

    The Advanced Fuel Cycle Initiative (AFCI) is developing a dynamic simulation model as part of their systems analysis of future nuclear energy in the United States. The Verifiable Fuel Cycle Simulation (VISION) model is being used to analyze and compare various proposed technology deployment scenarios, and to better understand the feedback between the various components of the nuclear fuel cycle that includes uranium resources, reactor number and mix, nuclear fuel type and waste management. VISION links these components into a single model for analysis and includes both mass flows and economics as a function of time. VISION tracks the life cycle of the strategic facilities that are essential in the fuel cycle such as, reactors, fuel fabrication, separations, spent fuel storage and conditioning and repository facilities. VISION is intended to assist in evaluating 'what if' scenarios and in comparing fuel, reactor, and fuel processing alternatives at a systems level for U.S. nuclear power. This paper describes the current functionality of the system dynamics model, discusses the assumptions, presents some results and presents plans for future development of VISION. The objective of VISION is to evaluate the elements of the nuclear fuel cycle that discriminate the different advanced fuel cycles. Specifically: - Perform dynamic scoping trade studies of alternative fuel cycles to obtain qualitative and quantitative comparisons of resource requirements, reactor types and mix, sequencing and timing, waste streams, and geologic repository requirements. - Quickly assess relative differences in fuel cycle strategies and timing with reasonable accuracy. - Provide a range of model outputs that can support both technical and management review. - Interact (in some fashion) with higher-level models, e.g., that compare among energy source options. - Interact (in some fashion) with lower-level modules, e.g., those providing detailed cost and process estimations for individual

  4. Vision enhanced navigation for unmanned systems

    Science.gov (United States)

    Wampler, Brandon Loy

    A vision based simultaneous localization and mapping (SLAM) algorithm is evaluated for use on unmanned systems. SLAM is a technique used by a vehicle to build a map of an environment while concurrently keeping track of its location within the map, without a priori knowledge. The work in this thesis is focused on using SLAM as a navigation solution when global positioning system (GPS) service is degraded or temporarily unavailable. Previous work on unmanned systems that lead up to the determination that a better navigation solution than GPS alone is first presented. This previous work includes control of unmanned systems, simulation, and unmanned vehicle hardware testing. The proposed SLAM algorithm follows the work originally developed by Davidson et al. in which they dub their algorithm MonoSLAM [1--4]. A new approach using the Pyramidal Lucas-Kanade feature tracking algorithm from Intel's OpenCV (open computer vision) library is presented as a means of keeping correct landmark correspondences as the vehicle moves through the scene. Though this landmark tracking method is unusable for long term SLAM due to its inability to recognize revisited landmarks, as opposed to the Scale Invariant Feature Transform (SIFT) and Speeded Up Robust Features (SURF), its computational efficiency makes it a good candidate for short term navigation between GPS position updates. Additional sensor information is then considered by fusing INS and GPS information into the SLAM filter. The SLAM system, in its vision only and vision/IMU form, is tested on a table top, in an open room, and finally in an outdoor environment. For the outdoor environment, a form of the slam algorithm that fuses vision, IMU, and GPS information is tested. The proposed SLAM algorithm, and its several forms, are implemented in C++ using an Extended Kalman Filter (EKF). Experiments utilizing a live video feed from a webcam are performed. The different forms of the filter are compared and conclusions are made on

  5. Verifiable Fuel Cycle Simulation (VISION) Model

    Energy Technology Data Exchange (ETDEWEB)

    Jacobson, J.J.; Matthern, G.E.; Piet, S.J.; Shropshire, D.E. [Idaho National Laboratory, 2525 North Fremont, Mail Stop 3710, Idaho Falls, Idaho 83415 (United States); Yacout, A.M. [Argonne National Laboratory (United States)

    2009-06-15

    The Advanced Fuel Cycle Initiative (AFCI) is developing a dynamic simulation model as part of their systems analysis of future nuclear energy in the United States. The Verifiable Fuel Cycle Simulation (VISION) model is being used to analyze and compare various proposed technology deployment scenarios, and to better understand the feedback between the various components of the nuclear fuel cycle that includes uranium resources, reactor number and mix, nuclear fuel type and waste management. VISION links these components into a single model for analysis and includes both mass flows and economics as a function of time. VISION tracks the life cycle of the strategic facilities that are essential in the fuel cycle such as, reactors, fuel fabrication, separations, spent fuel storage and conditioning and repository facilities. VISION is intended to assist in evaluating 'what if' scenarios and in comparing fuel, reactor, and fuel processing alternatives at a systems level for U.S. nuclear power. This paper describes the current functionality of the system dynamics model, discusses the assumptions, presents some results and presents plans for future development of VISION. The objective of VISION is to evaluate the elements of the nuclear fuel cycle that discriminate the different advanced fuel cycles. Specifically: - Perform dynamic scoping trade studies of alternative fuel cycles to obtain qualitative and quantitative comparisons of resource requirements, reactor types and mix, sequencing and timing, waste streams, and geologic repository requirements. - Quickly assess relative differences in fuel cycle strategies and timing with reasonable accuracy. - Provide a range of model outputs that can support both technical and management review. - Interact (in some fashion) with higher-level models, e.g., that compare among energy source options. - Interact (in some fashion) with lower-level modules, e.g., those providing detailed cost and process estimations for

  6. The secret world of shrimps: polarisation vision at its best

    CERN Document Server

    Kleinlogel, Sonja

    2008-01-01

    Animal vision spans a great range of complexity, with systems evolving to detect variations in optical intensity, distribution, colour, and polarisation. Polarisation vision systems studied to date detect one to four channels of linear polarisation, combining them in opponent pairs to provide intensity-independent operation. Circular polarisation vision has never been seen, and is widely believed to play no part in animal vision. Polarisation is fully measured via Stokes' parameters--obtained by combined linear and circular polarisation measurements. Optimal polarisation vision is the ability to see Stokes' parameters: here we show that the crustacean \\emph{Gonodactylus smithii} measures the exact components required. This vision provides optimal contrast-enhancement, and precise determination of polarisation with no confusion-states or neutral-points--significant advantages. We emphasise that linear and circular polarisation vision are not different modalities--both are necessary for optimal polarisation vis...

  7. Luminous efficacy of white LED in the mesopic vision state

    Institute of Scientific and Technical Information of China (English)

    JIN Peng; WANG Yi-feng; ZHOU Qi-feng; John Rooymans; YU Chun-yu

    2009-01-01

    The traditional eye sensitivity function based on photopic vision is not applicable in the mesopic vision state. The mesopic vision is studied by using the photopic and scotopic vision state sensitivity functions. And the model which links the mesopic sensitivity with the photopic and scotopic states is built. Based on the model, the luminous efficacy of mesopic vision is calculated and applied to the spectrum distribution of LED light sources. The results show that the luminous efficacy of a commercial YAG phosphor converted white LED is up to 172.7 lm/W at mesopic vision, which is 67.2 % higher than that of photopic vision state. We also conclude that the optimal spectral power distribution of the LED will greatly increase the mesopic luminous efficacy.

  8. Embedded Active Vision System Based on an FPGA Architecture

    Directory of Open Access Journals (Sweden)

    Pierre Chalimbaud

    2006-12-01

    Full Text Available In computer vision and more particularly in vision processing, the impressive evolution of algorithms and the emergence of new techniques dramatically increase algorithm complexity. In this paper, a novel FPGA-based architecture dedicated to active vision (and more precisely early vision is proposed. Active vision appears as an alternative approach to deal with artificial vision problems. The central idea is to take into account the perceptual aspects of visual tasks, inspired by biological vision systems. For this reason, we propose an original approach based on a system on programmable chip implemented in an FPGA connected to a CMOS imager and an inertial set. With such a structure based on reprogrammable devices, this system admits a high degree of versatility and allows the implementation of parallel image processing algorithms.

  9. Wavevector Selective Metasurfaces and Tunnel Vision Filters

    CERN Document Server

    Fedotov, Vassili A; Walther, Markus; Perino, Mauro; Papasimakis, Nikitas; Zheludev, Nikolay I

    2015-01-01

    Metasurfaces offer unprecedented flexibility in the design and control of light propagation, replacing bulk optical components and exhibiting exotic optical effects. One of the basic properties of the metasurfaces, which renders them as frequency selective surfaces, is the ability to transmit or reflect radiation within a narrow spectral band that can be engineered on demand. Here we introduce and demonstrate experimentally in the THz domain the concept of wavevector selective surfaces -- metasurfaces transparent only within a narrow range of light propagation directions operating effectively as tunnel vision filters. Practical implementations of the new concept include applications in wavefront manipulation, observational instruments, vision and free-space communication in light-scattering environments, as well as passive camouflage.

  10. The vision of a smart city

    Energy Technology Data Exchange (ETDEWEB)

    Hall, R.E.; Bowerman, B.; Braverman, J.; Taylor, J.; Todosow, H.; Von Wimmersperg, U.

    2000-09-28

    The vision of ''Smart Cities'' is the urban center of the future, made safe, secure environmentally green, and efficient because all structures--whether for power, water, transportation, etc. are designed, constructed, and maintained making use of advanced, integrated materials, sensors, electronics, and networks which are interfaced with computerized systems comprised of databases, tracking, and decision-making algorithms. This paper discusses a current initiative being led by the Brookhaven National Laboratory to create a research, development and deployment agenda that advances this vision. This is anchored in the application of new technology to current urban center issues while looking 20 years into the future and conceptualizing a city framework that may exist.

  11. Visions for the future of particle accelerators

    Science.gov (United States)

    Romaniuk, Ryszard S.

    2013-10-01

    The ambitions of accelerator based science, technology and applications far exceed the present accelerator possibilities. Accelerator science and technology is one of a key enablers of the developments in the particle physic, photon physics and also applications in medicine and industry. The paper presents a digest of the research results and visions for the future in the domain of accelerator science and technology in Europe, shown during the final fourth annual meeting of the EuCARD - European Coordination of Accelerator Research and Development. The conference concerns building of the research infrastructure, including advanced photonic and electronic systems for servicing large high energy physics experiments. There are debated a few basic groups of such systems like: measurement - control networks of large geometrical extent, multichannel systems for large amounts of metrological data acquisition, precision photonic networks of reference time, frequency and phase distribution. The main subject is however the vision for the future of particle accelerators and next generation light sources.

  12. Rethinking Robot Vision - Combining Shape and Appearance

    Directory of Open Access Journals (Sweden)

    Matthias J. Schlemmer

    2008-11-01

    Full Text Available Equipping autonomous robots with vision sensors provides a multitude of advantages by simultaneously bringing up difficulties with regard to different illumination conditions. Furthermore, especially with service robots, the objects to be handled must somehow be learned for a later manipulation. In this paper we summarise work on combining two different vision sensors, namely a laser range scanner and a monocular colour camera, for shape-capturing, detecting and tracking of objects in cluttered scenes without the need of intermediate user interaction. The use of different sensor types provides the advantage of separating the shape and the appearance of the object and therefore overcome the problem with changing illumination conditions. We describe the framework and its components of visual shape-capturing, fast 3D object detection and robust tracking as well as examples that show the feasibility of this approach.

  13. Colour vision screening among Saudi Arabian children

    Directory of Open Access Journals (Sweden)

    O. Matthew Oriowo

    2008-01-01

    Full Text Available Purpose: To determine the prevalence of congenital red-green colour vision defects among Saudi Arabian male and female children.Methods: The study involved 1638 elementary and high school participants (838 males, and 800 females, who were randomly selected and screened for red-green colour vision defects using the Ishihara (pseudo-isochromatic plates test. Inclusion criteria were Snellen VA 20/20 or better and absence of known ocular pathologies.Among the females, 0.75% of the 800 participants showed CVD, with 0.25% and 0.5% demonstratingprotan and deutan defects, respectively.Conclusion: The results show that the prevalence of red-green colour deficiency among the female children from central Saudi Arabia is not significantly different from that of female populations inwestern countries.  The current prevalence among the males is higher than previously reported for central Saudi Arabia, but less than for Caucasian populations. 

  14. 2020 Vision Project Summary, FY98

    Energy Technology Data Exchange (ETDEWEB)

    A Munoz; J. C. Clausen; K. P. Scott; K. W. Gordon

    1998-11-01

    The 2020 Vision project began in 1996 with two participating teachers and four classes. It has since grown to comprise more than a dozen participating teachers and hundreds of students across the country. Much of this growth took place in FY98, thanks to the accomplishment of several major goals: implementation of a mentor program, enhanced teacher training, a mid-year conference for students, recruitment of distant schools, and the development of an interactive Web site. The first part of this report describes these accomplishments, as well as future directions for 2020 Vision. The second part summarized the scenarios students wrote during the 1997-98 school year. it identifies recurrent themes in the students' scenarios and compares/contrasts them with scenarios written in the first two years of the project.

  15. Monocular Vision SLAM for Indoor Aerial Vehicles

    OpenAIRE

    Koray Çelik; Arun K. Somani

    2013-01-01

    This paper presents a novel indoor navigation and ranging strategy via monocular camera. By exploiting the architectural orthogonality of the indoor environments, we introduce a new method to estimate range and vehicle states from a monocular camera for vision-based SLAM. The navigation strategy assumes an indoor or indoor-like manmade environment whose layout is previously unknown, GPS-denied, representable via energy based feature points, and straight architectural lines. We experimentally ...

  16. Incremental vision-based topological SLAM

    OpenAIRE

    Angeli, Adrien; Doncieux, Stéphane; Meyer, Jean-Arcady; Filliat, David

    2008-01-01

    International audience In robotics, appearance-based topological map building consists in infering the topology of the environment explored by a robot from its sensor measurements. In this paper, we propose a vision-based framework that considers this data association problem from a loop-closure detection perspective in order to correctly assign each measurement to its location. Our approach relies on the visual bag of words paradigm to represent the images and on a discrete Bayes filter t...

  17. Zoom Vision System For Robotic Welding

    Science.gov (United States)

    Gilbert, Jeffrey L.; Hudyma, Russell M.

    1990-01-01

    Rugged zoom lens subsystem proposed for use in along-the-torch vision system of robotic welder. Enables system to adapt, via simple mechanical adjustments, to gas cups of different lengths, electrodes of different protrusions, and/or different distances between end of electrode and workpiece. Unnecessary to change optical components to accommodate changes in geometry. Easy to calibrate with respect to object in view. Provides variable focus and variable magnification.

  18. Stereoscopic Vision System For Robotic Vehicle

    Science.gov (United States)

    Matthies, Larry H.; Anderson, Charles H.

    1993-01-01

    Distances estimated from images by cross-correlation. Two-camera stereoscopic vision system with onboard processing of image data developed for use in guiding robotic vehicle semiautonomously. Combination of semiautonomous guidance and teleoperation useful in remote and/or hazardous operations, including clean-up of toxic wastes, exploration of dangerous terrain on Earth and other planets, and delivery of materials in factories where unexpected hazards or obstacles can arise.

  19. Prototype Optical Correlator For Robotic Vision System

    Science.gov (United States)

    Scholl, Marija S.

    1993-01-01

    Known and unknown images fed in electronically at high speed. Optical correlator and associated electronic circuitry developed for vision system of robotic vehicle. System recognizes features of landscape by optical correlation between input image of scene viewed by video camera on robot and stored reference image. Optical configuration is Vander Lugt correlator, in which Fourier transform of scene formed in coherent light and spatially modulated by hologram of reference image to obtain correlation.

  20. Using Computer Vision to Access Appliance Displays

    OpenAIRE

    Fusco, Giovanni; Tekin, Ender; Ladner, Richard E.; Coughlan, James M.

    2014-01-01

    People who are blind or visually impaired face difficulties accessing a growing array of everyday appliances, needed to perform a variety of daily activities, because they are equipped with electronic displays. We are developing a “Display Reader” smartphone app, which uses computer vision to help a user acquire a usable image of a display, to address this problem. The current prototype analyzes video from the smartphone’s camera, providing real-time feedback to guide the user until a satisfa...

  1. Capteurs et dimensionnement physique en vision

    OpenAIRE

    Louchet, Jean

    2012-01-01

    Tutoriel CAPTEUR National audience Le dimensionnement physique des capteurs en amont d'un systeme de vision artificielle, est un point souvent neglige ou sous-estime, conduisant parfois a des des efforts ou raffinements algorithmiques couteux, voire des echecs qui auraient pu etre evites si les caracteristiques precises du capteur avaient ete etudiees des la conception du systeme. Dans ce tutoriel, nous examinerons non les aspects electroniques (codage, cartes d'acquisition etc.) mais s...

  2. Schopenhauer on vision and the colors.

    Science.gov (United States)

    Crone, R A

    1997-01-01

    Arthur Schopenhauer (1788-1860) published his book, On Vision and the Colors in 1816. He started from Aristotle's linear color system and Goethe's three pairs of contrast colors. His work preceded Hering's theory of opponent colors but his path to insight was blocked by his anti-Newtonianism and his neo-Hellenistic attitude toward science. Because of his theory of the subjectivity of colors he was a forerunner of the psycho-physiological variant of neo-Kantianism. PMID:9476605

  3. Design Through Analysis (DTA) roadmap vision.

    Energy Technology Data Exchange (ETDEWEB)

    Blacker, Teddy Dean; Adams, Charles R.; Hoffman, Edward L.; White, David Roger; Sjaardema, Gregory D.

    2004-10-01

    The Design through Analysis Realization Team (DART) will provide analysts with a complete toolset that reduces the time to create, generate, analyze, and manage the data generated in a computational analysis. The toolset will be both easy to learn and easy to use. The DART Roadmap Vision provides for progressive improvements that will reduce the Design through Analysis (DTA) cycle time by 90-percent over a three-year period while improving both the quality and accountability of the analyses.

  4. Vision based behaviors for a legged robot

    OpenAIRE

    Ruiz, Juan V.; Montero, Pablo; Martín Rico, Francisco; Matellán Olivera, Vicente

    2005-01-01

    This article describes two vision-based behaviors designed for an autonomous legged robot. These behaviors have been designed in a modular way in order to be able to integrate them in an architecture named DSH (Dynamic Schema Hierarchies), which is also briefly described. These behaviors have been tested in office indoor environments and experiments carried out are also described in this paper. The platform used in these experiments carried out are also described in theis paper. The platform ...

  5. AI And Early Vision - Part II

    Science.gov (United States)

    Julesz, Bela

    1989-08-01

    A quarter of a century ago I introduced two paradigms into psychology which in the intervening years have had a direct impact on the psychobiology of early vision and an indirect one on artificial intelligence (AI or machine vision). The first, the computer-generated random-dot stereogram (RDS) paradigm (Julesz, 1960) at its very inception posed a strategic question both for AI and neurophysiology. The finding that stereoscopic depth perception (stereopsis) is possible without the many enigmatic cues of monocular form recognition - as assumed previously - demonstrated that stereopsis with its basic problem of finding matches between corresponding random aggregates of dots in the left and right visual fields became ripe for modeling. Indeed, the binocular matching problem of stereopsis opened up an entire field of study, eventually leading to the computational models of David Marr (1982) and his coworkers. The fusion of RDS had an even greater impact on neurophysiologists - including Hubel and Wiesel (1962) - who realized that stereopsis must occur at an early stage, and can be studied easier than form perception. This insight recently culminated in the studies by Gian Poggio (1984) who found binocular-disparity - tuned neurons in the input stage to the visual cortex (layer IVB in V1) in the monkey that were selectively triggered by dynamic RDS. Thus the first paradigm led to a strategic insight: that with stereoscopic vision there is no camouflage, and as such was advantageous for our primate ancestors to evolve the cortical machinery of stereoscopic vision to capture camouflaged prey (insects) at a standstill. Amazingly, although stereopsis evolved relatively late in primates, it captured the very input stages of the visual cortex. (For a detailed review, see Julesz, 1986a)

  6. Report on Computer Programs for Robotic Vision

    Science.gov (United States)

    Cunningham, R. T.; Kan, E. P.

    1986-01-01

    Collection of programs supports robotic research. Report describes computer-vision software library NASA's Jet Propulsion Laboratory. Programs evolved during past 10 years of research into robotics. Collection includes low- and high-level image-processing software proved in applications ranging from factory automation to spacecraft tracking and grappling. Programs fall into several overlapping categories. Image utilities category are low-level routines that provide computer access to image data and some simple graphical capabilities for displaying results of image processing.

  7. Vision Algorithms Catch Defects in Screen Displays

    Science.gov (United States)

    2014-01-01

    Andrew Watson, a senior scientist at Ames Research Center, developed a tool called the Spatial Standard Observer (SSO), which models human vision for use in robotic applications. Redmond, Washington-based Radiant Zemax LLC licensed the technology from NASA and combined it with its imaging colorimeter system, creating a powerful tool that high-volume manufacturers of flat-panel displays use to catch defects in screens.

  8. Computer vision techniques for underwater navigation

    OpenAIRE

    Barngrover, Christopher M.

    2010-01-01

    In the world of autonomous underwater vehicles (AUV) the prominent form of sensing has been sonar due to cloudy water conditions and dispersion of light. Although underwater conditions are highly suitable for sonar, this does not mean that vision techniques should be completely ignored. There are situations where visibility is high, such is in calm waters, and where light dispersion is not an issue, such as shallow water or near the surface. In addition, even when visibility is low, once a ce...

  9. Home 2040 - A Vision for Vartiosaari

    OpenAIRE

    Rinne, Niina

    2015-01-01

    The purpose of this thesis project is to design vision of a new sustainable residential area in Vartiosaari based on future megatrends and their effects on housing development. Vartiosaari is a 82-hectare island in eastern Helsinki. It is located in the midst of developed areas south of Tammisalo and between Laajasalo and Vuosaari. Vartiosaari lies on a 7-kilometre radius from the Helsinki city centre. The latest urban plan draft, made by the Helsinki City Planning department, permits con...

  10. Psychosocial implications ofblindness and low-vision

    OpenAIRE

    Schinazi, V. R.

    2007-01-01

    This article discusses several aspects of psychosocial adjustment to blindness andlow-vision and proposes that the education of both the self and society are essential forpositive adjustment. It exposes some of the general misunderstandings about visualimpairment and demonstrates how these are partly responsible for the perpetuation of mythsand misconceptions regarding the character and abilities of this population. It argues thatconfidence and self-esteem are deeply connected to ability and ...

  11. Biologically Inspired Vision for Indoor Robot Navigation

    OpenAIRE

    Saleiro, Mário; Tersic, K.; Lobato, D.; Rodrigues, J. M. F.; du Buf, J. M. H.

    2014-01-01

    Ultrasonic, infrared, laser and other sensors are being applied in robotics. Although combinations of these have allowed robots to navigate, they are only suited for specific scenarios, depending on their limitations. Recent advances in computer vision are turning cameras into useful low-cost sensors that can operate in most types of environments. Cameras enable robots to detect obstacles, recognize objects, obtain visual odometry, detect and recognize people and gestures, a...

  12. Understanding vision in wholly empirical terms

    OpenAIRE

    Purves, Dale; Wojtach, William T.; Lotto, R. Beau

    2011-01-01

    This article considers visual perception, the nature of the information on which perceptions seem to be based, and the implications of a wholly empirical concept of perception and sensory processing for vision science. Evidence from studies of lightness, brightness, color, form, and motion all indicate that, because the visual system cannot access the physical world by means of retinal light patterns as such, what we see cannot and does not represent the actual properties of objects or images...

  13. Smart Content Factory—Approaching the Vision

    OpenAIRE

    G. Güntner; Reich, S.

    2005-01-01

    In our paper we describe the objectives and achievements of a project called “Smart Content Factory”. The project aims at the creation of a knowledge-aware system infrastructure to support the utilization of audiovisual content. We will provide an overview of the project objectives and introduce “digital content engineering” as a scientific discipline dealing with concepts, methodologies, techniques and tools for a quantifiable approach towards the vision of smart content, thereby addressing ...

  14. Machine vision applications of digital watermarking

    Science.gov (United States)

    Stach, John

    2004-06-01

    In the realm of digital watermarks applied to analog media, publications have mostly focused on applications such as document authentication, security, and links where synchronization is merely used to read the payload. In recent papers, we described issues associated with the use of inexpensive cameras to read digital watermarks [5], and we have discussed product development issues associated with the use of watermarks for several applications [3.4.6]. However, the applications presented in these papers also have been focused on the detection and use of the watermark payload as the critical technology. In this paper, we will extend those ideas by examining a wider range of analog media such as objects and surfaces and by examining machine vision applications where the watermark synchronization method (i.e., synchronizing the watermark orientation so that a payload can be extracted) and the design characteristics of the watermark itself are as critical to the application as recovering the watermark payload. Some examples of machine vision applications that could benefit from digital watermarking technology are autonomous navigation, device and robotic control, assembly and parts handling, and inspection and calibration systems for nondestructive testing and analysis. In this paper, we will review some of these applications and show how combining synchronization and payload data can significantly enhance and broaden many machine vision applications.

  15. Computer vision cracks the leaf code.

    Science.gov (United States)

    Wilf, Peter; Zhang, Shengping; Chikkerur, Sharat; Little, Stefan A; Wing, Scott L; Serre, Thomas

    2016-03-22

    Understanding the extremely variable, complex shape and venation characters of angiosperm leaves is one of the most challenging problems in botany. Machine learning offers opportunities to analyze large numbers of specimens, to discover novel leaf features of angiosperm clades that may have phylogenetic significance, and to use those characters to classify unknowns. Previous computer vision approaches have primarily focused on leaf identification at the species level. It remains an open question whether learning and classification are possible among major evolutionary groups such as families and orders, which usually contain hundreds to thousands of species each and exhibit many times the foliar variation of individual species. Here, we tested whether a computer vision algorithm could use a database of 7,597 leaf images from 2,001 genera to learn features of botanical families and orders, then classify novel images. The images are of cleared leaves, specimens that are chemically bleached, then stained to reveal venation. Machine learning was used to learn a codebook of visual elements representing leaf shape and venation patterns. The resulting automated system learned to classify images into families and orders with a success rate many times greater than chance. Of direct botanical interest, the responses of diagnostic features can be visualized on leaf images as heat maps, which are likely to prompt recognition and evolutionary interpretation of a wealth of novel morphological characters. With assistance from computer vision, leaves are poised to make numerous new contributions to systematic and paleobotanical studies. PMID:26951664

  16. Night myopia is reduced in binocular vision.

    Science.gov (United States)

    Chirre, Emmanuel; Prieto, Pedro M; Schwarz, Christina; Artal, Pablo

    2016-06-01

    Night myopia, which is a shift in refraction with light level, has been widely studied but still lacks a complete understanding. We used a new infrared open-view binocular Hartmann-Shack wave front sensor to quantify night myopia under monocular and natural binocular viewing conditions. Both eyes' accommodative response, aberrations, pupil diameter, and convergence were simultaneously measured at light levels ranging from photopic to scotopic conditions to total darkness. For monocular vision, reducing the stimulus luminance resulted in a progression of the accommodative state that tends toward the subject's dark focus or tonic accommodation and a change in convergence following the induced accommodative error. Most subjects presented a myopic shift of accommodation that was mitigated in binocular vision. The impact of spherical aberration on the focus shift was relatively small. Our results in monocular conditions support the hypothesis that night myopia has an accommodative origin as the eye progressively changes its accommodation state with decreasing luminance toward its resting state in total darkness. On the other hand, binocularity restrains night myopia, possibly by using fusional convergence as an additional accommodative cue, thus reducing the potential impact of night myopia on vision at low light levels. PMID:27333457

  17. Effect of absence of vision on posture

    Science.gov (United States)

    Alotaibi, Abdullah Z.; Alghadir, Ahmad; Iqbal, Zaheen A.; Anwer, Shahnawaz

    2016-01-01

    [Purpose] The visual system is one of the sensory systems that enables the body to assess and process information about the external environment. In the absence of vision, a blind person loses contact with the outside world and develops faulty motor patterns, which results in postural deficiencies. However, literature regarding the development of such deficiencies is limited. The aim of this study was to discuss the effect of absence of vision on posture, the possible biomechanics behind the resulting postural deficiencies, and strategies to correct and prevent them. [Subjects and Methods] Various electronic databases including PubMed, Medline, and Google scholar were examined using the words “body”, “posture”, “blind” and “absence of vision”. References in the retrieved articles were also examined for cross-references. The search was limited to articles in the English language. [Results] A total of 74 papers were shortlisted for this review, most of which dated back to the 1950s and 60s. [Conclusion] Blind people exhibit consistent musculoskeletal deformities. Absence of vision leads to numerous abnormal sensory and motor interactions that often limit blind people in isolation. Rehabilitation of the blind is a multidisciplinary task. Specialists from different fields need to diagnose and treat the deficiencies of the blind together as a team. Before restoring the normal mechanics of posture and gait, the missing link with the external world should be reestablished. PMID:27190486

  18. Optical correlator techniques applied to robotic vision

    Science.gov (United States)

    Hine, Butler P., III; Reid, Max B.; Downie, John D.

    1991-01-01

    Vision processing is one of the most computationally intensive tasks required of an autonomous robot. The data flow from a single typical imaging sensor is roughly 60 Mbits/sec, which can easily overload current on-board processors. Optical correlator-based processing can be used to perform many of the functions required of a general robotic vision system, such as object recognition, tracking, and orientation determination, and can perform these functions fast enough to keep pace with the incoming sensor data. We describe a hybrid digital electronic/analog optical robotic vision processing system developed at Ames Research Center to test concepts and algorithms for autonomous construction, inspection, and maintenance of space-based habitats. We discuss the system architecture design and implementation, its performance characteristics, and our future plans. In particular, we compare the performance of the system to a more conventional all digital electronic system developed concurrently. The hybrid system consistently outperforms the digital electronic one in both speed and robustness.

  19. Vision based flight procedure stereo display system

    Science.gov (United States)

    Shen, Xiaoyun; Wan, Di; Ma, Lan; He, Yuncheng

    2008-03-01

    A virtual reality flight procedure vision system is introduced in this paper. The digital flight map database is established based on the Geographic Information System (GIS) and high definitions satellite remote sensing photos. The flight approaching area database is established through computer 3D modeling system and GIS. The area texture is generated from the remote sensing photos and aerial photographs in various level of detail. According to the flight approaching procedure, the flight navigation information is linked to the database. The flight approaching area vision can be dynamic displayed according to the designed flight procedure. The flight approaching area images are rendered in 2 channels, one for left eye images and the others for right eye images. Through the polarized stereoscopic projection system, the pilots and aircrew can get the vivid 3D vision of the flight destination approaching area. Take the use of this system in pilots preflight preparation procedure, the aircrew can get more vivid information along the flight destination approaching area. This system can improve the aviator's self-confidence before he carries out the flight mission, accordingly, the flight safety is improved. This system is also useful in validate the visual flight procedure design, and it helps to the flight procedure design.

  20. Binocular Vision Problems in Refractive Surgery Patients: Vision Therapy Case Reports

    Directory of Open Access Journals (Sweden)

    Gina Day, OD

    2015-02-01

    Full Text Available Background: Some post-LASIK patients complain of blurry distance vision months after refractive surgery, despite good corneal healing and negligible refractive error. We postulated that perceiving blur in the absence of refractive error or significant monocular aberrations might result from poor binocular control. Binocular vision testing in a series of such patients revealed convergence problems in 83% of cases. Case Reports: We report on 8 patients (average age 37.4 yrs who completed up to 40 sessions of vision therapy (VT, either completely via computer or in a combination of computer orthoptics and office vision therapy. Seven patients had received LASIK; one had PRK. Optometric measurements and symptoms were recorded before and after VT treatment, starting at least 3 months after refractive surgery. Near point of convergence improved in 7 cases following VT, and convergence break and/or recovery improved in 6 cases. Six cases reported symptom reduction, and pre-presbyopic cases tended to improve accommodative facility. The number of binocular functions showing improvement per case correlated with the number of VT sessions completed. Convergence changes were statistically significant when pre-/post-VT data were compared for these cases as a group. Conclusion: Patients complaining of distance blur following refractive surgery may have undiagnosed binocular vision problems. VT incorporating an internet orthoptics component improved convergence ability in the cases reported here, and most patients reported symptomatic relief.

  1. Effect of firefighter masks on monocular and binocular peripheral vision.

    Science.gov (United States)

    Samo, Daniel G; Bahk, Jane K; Gerkin, Richard D

    2003-04-01

    Peripheral vision can impact essential job functions of firefighters and other workers who use Self-Contained Breathing Apparatus and other full face masks. It is important for physicians to know how these masks alter peripheral vision. Also, one must understand the effect of monocular vision on peripheral vision. Using the Goldman Perimeter Machine we measured peripheral vision in the monocular and binocular state, with and without two different types of masks. The results show that monocularity causes an average loss of 23 degrees in the nasal meridian. The use of the masks did not affect this difference. Also, the masks caused an average loss of 28 degrees of peripheral vision in the inferior meridian. How these losses affect the ability of the users of the masks to perform their essential job functions still needs to be researched. PMID:12708146

  2. Synthetic Vision Systems - Operational Considerations Simulation Experiment

    Science.gov (United States)

    Kramer, Lynda J.; Williams, Steven P.; Bailey, Randall E.; Glaab, Louis J.

    2007-01-01

    Synthetic vision is a computer-generated image of the external scene topography that is generated from aircraft attitude, high-precision navigation information, and data of the terrain, obstacles, cultural features, and other required flight information. A synthetic vision system (SVS) enhances this basic functionality with real-time integrity to ensure the validity of the databases, perform obstacle detection and independent navigation accuracy verification, and provide traffic surveillance. Over the last five years, NASA and its industry partners have developed and deployed SVS technologies for commercial, business, and general aviation aircraft which have been shown to provide significant improvements in terrain awareness and reductions in the potential for Controlled-Flight-Into-Terrain incidents/accidents compared to current generation cockpit technologies. It has been hypothesized that SVS displays can greatly improve the safety and operational flexibility of flight in Instrument Meteorological Conditions (IMC) to a level comparable to clear-day Visual Meteorological Conditions (VMC), regardless of actual weather conditions or time of day. An experiment was conducted to evaluate SVS and SVS-related technologies as well as the influence of where the information is provided to the pilot (e.g., on a Head-Up or Head-Down Display) for consideration in defining landing minima based upon aircraft and airport equipage. The "operational considerations" evaluated under this effort included reduced visibility, decision altitudes, and airport equipage requirements, such as approach lighting systems, for SVS-equipped aircraft. Subjective results from the present study suggest that synthetic vision imagery on both head-up and head-down displays may offer benefits in situation awareness; workload; and approach and landing performance in the visibility levels, approach lighting systems, and decision altitudes tested.

  3. Resilience and vision impairment in older people.

    Science.gov (United States)

    Thetford, Clare; Bennett, Kate M; Hodge, Suzanne; Knox, Paul C; Robinson, Jude

    2015-12-01

    Some people fare better than others when faced with adversity; they appear to be more 'resilient'. This article explores the concept of resilience in the context of vision impairment using two linked sets of narrative interview data from 2007 to 2010. Three case studies were analysed in detail using a framework approach based upon a social-ecological model of resilience and vision impairment. Within the model a range of assets and resources are identified which influence an individual's capacity for resilience. A set of criteria were used to establish the extent to which each individual appeared to be resilient at each point in time. Analysis revealed that it is not merely the presence or absence of individual, social, and community resources - but how these resources interact with each other - that influences resilience and can create a risk to wellbeing. To possess only some of these resources is not sufficient; there is a co-dependency between these resources which requires the presence of other resources for resilience to be achieved. Resilience is not a fixed state; individuals can become more or less resilient as their circumstances and resources change over time. We suggest that the concept of resilience has much to offer the field of vision impairment as it allows the identification of enablers as well as areas of barriers to improving people's health and wellbeing and suggests further opportunities for service providers to engage with clients, even those who appear to be supported, as people's social, economic and emotional landscapes continue to change over time, rather than identifying deficit. PMID:26568213

  4. Intertwining Of Teleoperation And Computer Vision

    Science.gov (United States)

    Bloom, B. C.; Duane, G. S.; Epstein, M. A.; Magee, M.; Mathis, D. W.; Nathan, M. J.; Wolfe, W. J.

    1987-01-01

    In the rapid pursuit of automation, it is sometimes overlooked that an elaborate human-machine interplay is still necessary, despite the fact that a fully automated system, by definition, would not require a human interface. In the future, real-time sensing, intelligent processing, and dextrous manipulation will become more viable, but until then it is necessary to use humans for many critical processes. It is not obvious, however, how automated subsystems could account for human intervention, especially if a philosophy of "pure" automation dominates the design. Teleoperation, by contrast, emphasizes the creation of hardware pathways (e.g., hand-controllers, exoskeletons) to quickly communicate low-level control data to various mechanisms, while providing sensory feedback in a format suitable for human consumption (e.g., stereo displays, force reflection), leaving the "intelligence" to the human. These differences in design strategy, both hardware and software, make it difficult to tie automation and teleoperation together, while allowing for graceful transitions at the appropriate times. In no area of artifical intelligence is this problem more evident than in computer vision. Teleoperation typically uses video displays (monochrome/color, monoscopic/ stereo) with contrast enhancement and gain control without any digital processing of the images. However, increases in system performance such as automatic collision avoidance, path finding, and object recognition depend on computer vision techniques. Basically, computer vision relies on the digital processing of the images to extract low-level primitives such as boundaries and regions that are used in higher-level processes for object recognition and positions. Real-time processing of complex environments is currently unattainable, but there are many aspects of the processing that are useful for situation assessment, provided it is understood the human can assist in the more time-consuming steps.

  5. Keratoprotection treatment after excimerlaser vision correction

    Directory of Open Access Journals (Sweden)

    S. A. Korotkikh

    2015-10-01

    Full Text Available Observational study of patients after excimerlaser vision correction by LASEK method.Purpose: to estimate efficacy HILOZAR-COMOD® solution in patients after excimerlaser vision correction.Patients and methods: We examined 80 eyes (40 patients after excimer laser correction by LASIK method. All patients were divided in 2 groups. The patients from the first group were treated with by standard drug’s scheme, included deprotein izing the dialysate from the blood of healthy dairy calves (Solkoseryl® eye gel. HILOZAR-COMOD ® was prescribed as cornea protector in the 2 group of patients.Results: In the first group complete cornea epitalization by biomicroscopy in 70 % eyes after 48 hours of excimerlaser vision correction was found. Minimal unepitalization areas were diagnosed in 30 % (12 eyes. In the second group complete cornea epitalization was found in 82,5 % eyes (33 eyes in the same term after excimerlaser correction. Cornea epitelium defects in optical area were diagnosed in the17,5 % eyes. The difference between number of patients with cornea epitelium defects first and second groups was 12,5 %. 97,5 % patients (39 eyes of second group (HILOZAR-COMOD ® had complete cornea epitelization after 72 hours of excimer laser correction. In the same term unepitelization areas were found in 3 eyes (7,5 % in patients of first group. It was to 5 % more than in the first group, where dexpantenol and hyaluronic acid was used (complete cornea epitalization in first group was found in 37 eyes.Conclusions: The combined medicine included dexpantenol and hyaluronic acid decreases intensity of the dry eye symptoms, stimulate quick and full cornea healing and decrease the risk of postoperative complications risk.

  6. Vision-related research priorities and how to finance them

    OpenAIRE

    McCarty, Catherine A

    2012-01-01

    A number of organizations have employed a consultative process with the vision community to engage relevant parties in identifying needs and opportunities for vision research. The National Eye Institute in the US and the European Commission are currently undergoing consultation to develop priorities for vision research. Once these priorities have been established, the challenge will be to identify the resources to advance these research agendas. Success rates for Federal funding for research ...

  7. 3D Vision in a Virtual Reality Robotics Environment

    OpenAIRE

    Schütz, Christian L.; Natonek, Emerico; Baur, Charles; Hügli, Heinz

    2009-01-01

    Virtual reality robotics (VRR) needs sensing feedback from the real environment. To show how advanced 3D vision provides new perspectives to fulfill these needs, this paper presents an architecture and system that integrates hybrid 3D vision and VRR and reports about experiments and results. The first section discusses the advantages of virtual reality in robotics, the potential of a 3D vision system in VRR and the contribution of a knowledge database, robust control and the combination of in...

  8. Machine Vision Application for Food Quality: A Review

    OpenAIRE

    K.Vijayarekha

    2012-01-01

    This study aims at discussing various methods of machine vision approaches incorporated for finding the food quality. Automatic grading and sorting of food materials like fruits, vegetables and food grains is gaining importance with the advent of machine vision technology which is a Non Destructive Testing method. It incorporates image processing techniques. The image processing steps for machine vision applications for determining the quality of food products include image acquisition, image...

  9. Multifactorial Uncertainty Assessment for Monitoring Population Abundance using Computer Vision

    OpenAIRE

    Beauxis-Aussalet, Emmanuelle; Hardman, Hazel Lynda

    2015-01-01

    Computer vision enables in-situ monitoring of animal populations at a lower cost and with less ecosystem disturbance than with human observers. However, computer vision uncertainty may not be fully understood by end-users, and the uncertainty assessments performed by technology experts may not fully address end-user needs. This knowledge gap can yield misinterpretations of computer vision data, and trust issues impeding the transfer of valuable technologies. We bridge this gap with a user-cen...

  10. Enhancing Color Representation for the Color Vision Impaired

    OpenAIRE

    Huang, Jia-Bin; Wu, Sih-Ying; Chen, Chu-Song

    2008-01-01

    In this paper, we propose a fast re-coloring algorithm to improve the accessibility for the color vision impaired. Compared to people with normal color vision, people with color vision impairment have difficulty in distinguishing between certain combinations of colors. This may hinder visual communication owing to the increasing use of colors in recent years. To address this problem, we re-map the hue components in the HSV color space based on the statistics of local characteristics of the or...

  11. The SmartVision navigation prototype for the blind

    OpenAIRE

    du Buf, J. M. H.; Barroso, João; J.M.F. Rodrigues; Paredes, Hugo; Farrajota, Miguel; Fernandes, Hugo; José, João; Teixeira, Victor; Saleiro, Mário

    2010-01-01

    The goal of the project "SmartVision: active vision for the blind" is to develop a small and portable but intelligent and reliable system for assisting the blind and visually impaired while navigating autonomously, both outdoor and indoor. In this paper we present an overview of the prototype, design issues, and its different modules which integrate a GIS with GPS, Wi-Fi, RFID tags and computer vision. The prototype addresses global navigation by following known landmarks, local navigation wi...

  12. Vision based localization: from humanoid robots to visually impaired people

    OpenAIRE

    Fernández Alcantarilla, Pablo

    2011-01-01

    Nowadays, 3D applications have recently become a more and more popular topic in robotics, computer vision or augmented reality. By means of cameras and computer vision techniques, it is possible to obtain accurate 3D models of large-scale environments such as cities. In addition, cameras are low-cost, non-intrusive sensors compared to other sensors such as laser scanners. Furthermore, cameras also offer a rich information about the environment. One application of great interest is the vision-...

  13. Synthetic vision and memory for autonomous virtual humans

    OpenAIRE

    Peters, Christopher; O'SULLIVAN, CAROL ANN

    2002-01-01

    PUBLISHED A memory model based on ?stage theory?, an influential concept of memory from the field of cognitive psychology, is presented for application to autonomous virtual humans. The virtual human senses external stimuli through a synthetic vision system. The vision system incorporates multiple modes of vision in order to accommodate a perceptual attention approach. The memory model is used to store perceived and attended object information at different stages in a filtering...

  14. Pose Estimation and Calibration Algorithms for Vision and Inertial Sensors

    OpenAIRE

    Hol, Jeroen Diederik

    2008-01-01

    This thesis deals with estimating position and orientation in real-time, using measurements from vision and inertial sensors. A system has been developed to solve this problem in unprepared environments, assuming that a map or scene model is available. Compared to ‘camera-only’ systems, the combination of the complementary sensors yields an accurate and robust system which can handle periods with uninformative or no vision data and reduces the need for high frequency vision updates. The syste...

  15. Hierarchical Object-Based Visual Attention for Machine Vision

    OpenAIRE

    Sun, Yaoru

    2003-01-01

    Human vision uses mechanisms of covert attention to selectively process interesting information and overt eye movements to extend this selectivity ability. Thus, visual tasks can be effectively dealt with by limited processing resources. Modelling visual attention for machine vision systems is not only critical but also challenging. In the machine vision literature there have been many conventional attention models developed but they are all space-based only and cannot perform ...

  16. Robotics Vision for a Scouting Rover - PRoViScout

    Science.gov (United States)

    Paar, G.; Woods, M.; Pullan, D.; Proviscout Team

    2011-10-01

    The FP7-SPACE Project ProViScout (Planetary Robotics Vision Scout, scheduled from April 2010 to September 2012) aims to demonstrate the feasibility of vision-based autonomous sample identification & selection in combination with vision-based navigation for a long range scouting/exploration mission on a terrestrial planet along with the robotic elements required. The paper gives an overview of the PRoViScout technical and scientific objectives, envisaged solutions and achievements so far.

  17. Vision for Autonomous Vehicles and Probes (Dagstuhl Seminar 15461)

    OpenAIRE

    Bruhn, André; Imiya, Atsushi; Leonardis, Ales; Pajdla, Tomas

    2016-01-01

    The vision-based autonomous driving and navigation of vehicles has a long history. In 2013, Daimler succeeded autonomous driving on a public drive way. Today, the Curiosity mars rover is sending video views from Mars to Earth. Computer vision plays a key role in advanced driver assistance systems (ADAS) as well as in exploratory and service robotics. Continuing topics of interest in computer vision are scene and environmental understanding using single- and multiple-camera systems, which are ...

  18. Machine Vision Tests for Spent Fuel Scrap Characteristics

    International Nuclear Information System (INIS)

    The purpose of this work is to perform a feasibility test of a Machine Vision system for potential use at the Hanford K basins during spent nuclear fuel (SNF) operations. This report documents the testing performed to establish functionality of the system including quantitative assessment of results. Fauske and Associates, Inc., which has been intimately involved in development of the SNF safety basis, has teamed with Agris-Schoen Vision Systems, experts in robotics, tele-robotics, and Machine Vision, for this work

  19. Mechanisms, functions and ecology of colour vision in the honeybee

    OpenAIRE

    Hempel de Ibarra, N.; Vorobyev, M.; Menzel, R

    2014-01-01

    Research in the honeybee has laid the foundations for our understanding of insect colour vision. The trichromatic colour vision of honeybees shares fundamental properties with primate and human colour perception, such as colour constancy, colour opponency, segregation of colour and brightness coding. Laborious efforts to reconstruct the colour vision pathway in the honeybee have provided detailed descriptions of neural connectivity and the properties of photoreceptors and interneurons in the ...

  20. Understanding vision: students’ use of light and optics resources

    International Nuclear Information System (INIS)

    We present a qualitative study designed to examine how students construct an understanding of the human eye and vision from their knowledge of light and optics. As would be expected, vast differences are shown to exist between pre- and post-instruction students in terms of not only resource use, but also willingness to transfer their existing knowledge. However, we have found that appropriate scaffolding can facilitate resource activation and guide students to construct an understanding of vision and vision defects. (paper)

  1. Strategies for object manipulation using foveal and peripheral vision

    OpenAIRE

    Kragic, Danica; Björkman, Mårten

    2006-01-01

    Computer vision is gaining significant importance as a cheap, passive, and information-rich sensor in research areas such as unmanned vehicles, medical robotics, human-machine interaction, autonomous navigation,robotic manipulation and grasping. However, a current trend is to build computer vision systems that are used to perform a specific task which makes it hard to reuse the ideas across different disciplines. In this paper, we concentrate on vision strategies for robotic manipulation task...

  2. History of direct vision internal urethrotomy.

    Science.gov (United States)

    Schultheiss, D; Truss, M C; Jonas, U

    1998-10-01

    Throughout medical history, the treatment of urethral strictures ranged from catheterization, the insertion of bougies, and the application of caustics to different methods of dilation, blind internal urethrotomy, and open surgery. The rise of endoscopy in the 19th century added the possibility of direct vision internal urethrotomy to this therapeutic spectrum. The development of this endourologic method is recapitulated from the first report in 1865 to the gold standard of cold knife urethrotomy in 1971 and later modifications (eg, advanced laser techniques). PMID:9763106

  3. Unique Vision Project o.p.s.

    OpenAIRE

    Unique, Elis

    2010-01-01

    As a main guide in determining the objectives of my thesis, I had used the most recent sociological researches from which I had derived some of the social public needs and in order to serve those needs, I tried to find ways, how it's possible to enrich Prague's cultural life and use art therapy in routine practice of Prague's NGO Unique Vision Project o.p.s. to strengthen social cohesion and integration. I present outlines of a business plan and a detailed plan of the various social activitie...

  4. Monocular Vision Based SLAM for Mobile Robots

    OpenAIRE

    Mouragnon, Etienne; Lhuillier, Maxime; Dhome, Michel; Dekeyser, Fabien; Sayd, Patrick

    2006-01-01

    This paper describes a new vision based method for the Simultaneous Localization and Mapping of mobile robots. The only data used is a video input from a moving cali- brated monocular camera. From the detection and match- ing of interest points in images at video rate, robust esti- mates of the camera poses are computed in real-time and a 3D map of the environment is reconstructed. The computed 3D structure is constantly refined thanks to the introduction of a fast and local bundle adjustment...

  5. Colour vision and computer-generated images

    International Nuclear Information System (INIS)

    Colour vision deficiencies affect approximately 8% of the male and approximately 0.4% of the female population. In this work, it is demonstrated that computer generated images oftentimes pose unnecessary problems for colour deficient viewers. Three examples, the visualization of molecular structures, graphs of mathematical functions, and colour coded images from numerical data are used to identify problematic colour combinations: red/black, green/black, red/yellow, yellow/white, fuchsia/white, and aqua/white. Alternatives for these combinations are discussed.

  6. Nuclear fuel assembly identification using computer vision

    International Nuclear Information System (INIS)

    This report describes an improved method of remotely identifying irradiated nuclear fuel assemblies. The method uses existing in-cell TV cameras to input an image of the notch-coded top of the fuel assemblies into a computer vision system, which then produces the identifying number for that assembly. This system replaces systems that use either a mechanical mechanism to feel the notches or use human operators to locate notches visually. The system was developed for identifying fuel assemblies from the Fast Flux Test Facility (FFTF) and the Clinch River Breeder Reactor, but could be used for other reactor assembly identification, as appropriate

  7. Single Camera Calibration in 3D Vision

    OpenAIRE

    Caius SULIMAN; Puiu, Dan; Moldoveanu, Florin

    2009-01-01

    Camera calibration is a necessary step in 3D vision in order to extract metric information from 2D images. A camera is considered to be calibrated when the parameters of the camera are known (i.e. principal distance, lens distorsion, focal length etc.). In this paper we deal with a single camera calibration method and with the help of this method we try to find the intrinsic and extrinsic camera parameters. The method was implemented with succes in the programming and simulation environment M...

  8. Robot Arms with 3D Vision Capabilities

    OpenAIRE

    Borangiu, Theodor; Alexandru DUMITRACHE

    2010-01-01

    This chapter presented two applications of 3D vision in industrial robotics. The first one allows 3D reconstruction of decorative objects using a laser-based profile scanner mounted on a 6-DOF industrial robot arm, while the scanned part is placed on a rotary table. The second application uses the same profile scanner for 3D robot guidance along a complex path, which is learned automatically using the laser sensor and then followed using a physical tool. While the laser sensor is an expensive...

  9. Progress in computer vision and image analysis

    CERN Document Server

    Bunke, Horst; Sánchez, Gemma; Otazu, Xavier

    2009-01-01

    This book is a collection of scientific papers published during the last five years, showing a broad spectrum of actual research topics and techniques used to solve challenging problems in the areas of computer vision and image analysis. The book will appeal to researchers, technicians and graduate students. Sample Chapter(s). Chapter 1: An Appearance-Based Method for Parametric Video Registration (2,352 KB). Contents: An Appearance-Based Method for Parametric Video Registration (X Orriols et al.); Relevance of Multifractal Textures in Static Images (A Turiel); Potential Fields as an External

  10. Medical Computer Vision, Virtual Reality and Robotics

    OpenAIRE

    Ayache, Nicholas

    1995-01-01

    The automated analysis of 3D medical images can improve both diagnosis and therapy significantly. This automation raises a number of new fascinating research problems in the fields of computer vision, graphics and robotics. In this paper, I propose a list of such problems after a review of the current major 3D imaging modalities, and a description of the related medical needs. I then present some of the past and current work done in our research group EPIDAURE at INRIA, on the following topic...

  11. Research on Virtual Vehicle Driven with Vision

    Directory of Open Access Journals (Sweden)

    Youquan Liu

    2011-08-01

    Full Text Available This paper presents a traffic-oriented modeling and simulation framework. With this tool, users can create a traffic scene quickly and easily, and then drive the vehicle in the created scene with physics simulated. Especially, the vehicle could be driven with vision technology, which is equipped with a webcam and a paper printed with controlling markers. And the paper is used as the virtual wheel to control the motion of the vehicle. At such low cost, many people can enjoy the driving fun; it also provides an easy and interesting way for driving video games with promising business values.

  12. Algorithms for image processing and computer vision

    CERN Document Server

    Parker, J R

    2010-01-01

    A cookbook of algorithms for common image processing applications Thanks to advances in computer hardware and software, algorithms have been developed that support sophisticated image processing without requiring an extensive background in mathematics. This bestselling book has been fully updated with the newest of these, including 2D vision methods in content-based searches and the use of graphics cards as image processing computational aids. It's an ideal reference for software engineers and developers, advanced programmers, graphics programmers, scientists, and other specialists wh

  13. Computer Vision Using Local Binary Patterns

    CERN Document Server

    Pietikainen, Matti; Zhao, Guoying; Ahonen, Timo

    2011-01-01

    The recent emergence of Local Binary Patterns (LBP) has led to significant progress in applying texture methods to various computer vision problems and applications. The focus of this research has broadened from 2D textures to 3D textures and spatiotemporal (dynamic) textures. Also, where texture was once utilized for applications such as remote sensing, industrial inspection and biomedical image analysis, the introduction of LBP-based approaches have provided outstanding results in problems relating to face and activity analysis, with future scope for face and facial expression recognition, b

  14. JPL Robotics Laboratory computer vision software library

    Science.gov (United States)

    Cunningham, R.

    1984-01-01

    The past ten years of research on computer vision have matured into a powerful real time system comprised of standardized commercial hardware, computers, and pipeline processing laboratory prototypes, supported by anextensive set of image processing algorithms. The software system was constructed to be transportable via the choice of a popular high level language (PASCAL) and a widely used computer (VAX-11/750), it comprises a whole realm of low level and high level processing software that has proven to be versatile for applications ranging from factory automation to space satellite tracking and grappling.

  15. Computer vision technology in log volume inspection

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Log volume inspection is very important in forestry research and paper making engineering. This paper proposed a novel approach based on computer vision technology to cope with log volume inspection. The needed hardware system was analyzed and the details of the inspection algorithms were given. A fuzzy entropy based on image enhancement algorithm was presented for enhancing the image of the cross-section of log. In many practical applications the cross-section is often partially invisible, and this is the major obstacle for correct inspection. To solve this problem, a robust Hausdorff distance method was proposed to recover the whole cross-section. Experiment results showed that this method was efficient.

  16. Flexible electrode array for artifical vision

    Science.gov (United States)

    Krulevitch, Peter; Polla, Dennis L.; Maghribi, Mariam N.; Hamilton, Julie

    2006-12-05

    An image is captured or otherwise converted into a signal in an artificial vision system. The signal is transmitted to the retina utilizing an implant. The implant consists of a polymer substrate made of a compliant material such as poly(dimethylsiloxane) or PDMS. The polymer substrate is conformable to the shape of the retina. Electrodes and conductive leads are embedded in the polymer substrate. The conductive leads and the electrodes transmit the signal representing the image to the cells in the retina. The signal representing the image stimulates cells in the retina.

  17. Mathematical optimization in computer graphics and vision

    CERN Document Server

    Velho, Luiz; Gomes, Jonas; de Figueiredo, Luiz

    2011-01-01

    Mathematical optimization is used in nearly all computer graphics applications, from computer vision to animation. This book teaches readers the core set of techniques that every computer graphics professional should understand in order to envision and expand the boundaries of what is possible in their work. Study of this authoritative reference will help readers develop a very powerful tool- the ability to create and decipher mathematical models that can better realize solutions to even the toughest problems confronting computer graphics community today.*Distills down a vast a

  18. Ultraviolet-Blocking Lenses Protect, Enhance Vision

    Science.gov (United States)

    2010-01-01

    To combat the harmful properties of light in space, as well as that of artificial radiation produced during laser and welding work, Jet Propulsion Laboratory (JPL) scientists developed a lens capable of absorbing, filtering, and scattering the dangerous light while not obstructing vision. SunTiger Inc. now Eagle Eyes Optics, of Calabasas, California was formed to market a full line of sunglasses based on the JPL discovery that promised 100-percent elimination of harmful wavelengths and enhanced visual clarity. The technology was recently inducted into the Space Technology Hall of Fame.

  19. Active vision in satellite scene analysis

    Science.gov (United States)

    Naillon, Martine

    1994-01-01

    In earth observation or planetary exploration it is necessary to have more and, more autonomous systems, able to adapt to unpredictable situations. This imposes the use, in artificial systems, of new concepts in cognition, based on the fact that perception should not be separated from recognition and decision making levels. This means that low level signal processing (perception level) should interact with symbolic and high level processing (decision level). This paper is going to describe the new concept of active vision, implemented in Distributed Artificial Intelligence by Dassault Aviation following a 'structuralist' principle. An application to spatial image interpretation is given, oriented toward flexible robotics.

  20. ROBERT autonomous navigation robot with artificial vision

    International Nuclear Information System (INIS)

    This work, a joint research between ENEA (the Italian National Agency for Energy, New Technologies and the Environment) and DIGlTAL, presents the layout of the ROBERT project, ROBot with Environmental Recognizing Tools, under development in ENEA laboratories. This project aims at the development of an autonomous mobile vehicle able to navigate in a known indoor environment through the use of artificial vision. The general architecture of the robot is shown together with the data and control flow among the various subsystems. Also the inner structure of the latter complete with the functionalities are given in detail